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Environmental Tutorial Start Overpopulation Greenhouse Effect Ozone Depletion Acid Rain Deforestation If possible, place your keyboard aside. You will not need it for this tutorial. Navigate using your mouse. Take the Quiz Back Hunter/Gathering Societies Home For much of human history, the population of humans was quite small. Humans relied on hunting prey and gathering plants as a means of survival. The small groups of people would follow the migration patterns of various animals and picked plants along the way. Since they rarely stayed in a single area for long periods of time and food was often unreliable, family groups were small. Imagine if today, the billions of people on Earth still followed the idea of hunting and gathering instead of modern agriculture. Back Agriculture Home Since the development of agriculture thousands of years ago, the human population has greatly increased. Agriculture is the cultivation of animals, plants, fungi and other life forms for food, fiber, and other products used to sustain life. This has led to a large increase in the human population as food became more reliable. Currently there are over 7 billion people on Earth. Some would argue that because of the large number of resources that humans consume, the Earth is now overpopulated. Overpopulation is considered the most serious environmental concern our world faces. More people leads to more crime. More use of resources. More war. More pollution. Back Overpopulation Home In the graph above, you can see the estimated world population up to the year 2025. As long as the birth rates around the world exceed the death rates, the human population will continue to increase. Improvements in agriculture, health care, and sanitation has lead to the world population increase. The last time the human population dropped was around 1350, when an estimated 50% of Europe died as a result of bacteria that was carried by fleas. Back Overpopulation Home In the graph above, you can see the estimated world population up to the year 2025. As long as the birth rates around the world exceed the death rates, the human population will continue to increase. Improvements in agriculture, health care, and sanitation has lead to the world population increase. The last time the human population dropped was around 1350, when an estimated 50% of Europe died as a result of bacteria that was carried by fleas. Many environmental problems, such as rising levels of atmospheric carbon dioxide, climate change, and pollution, were increased by the growing human population. Back The Greenhouse Effect average temp = 57°F Home Average temp = -10°F The Earth and moon are about the same distance from the sun. But the Earth is much warmer. The reason is simple. The Earth has an atmosphere. The Earth’s atmosphere traps heat to warm the planet. The trapping of heat is known as the greenhouse effect. Back The Greenhouse Effect Home A greenhouse is a glass building used to grow plants year round, even in cold areas. Since glass traps heat, the glass acts like an atmosphere. That’s why science named this warming process on Earth the “greenhouse effect.” The atmosphere acts like a glass building surrounding the Earth. The heat that is trapped by this natural process warms the planet. That is very good. So why is the greenhouse effect often mentioned as a problem created by humans? Back The Man-Made Greenhouse Effect Home Naturally, the greenhouse effect is very good. As mentioned, this process warms the Earth. However, as a result of human actions, the greenhouse effect is out of balance. As technology has progressed, so has our need for energy. That means the burning of fossil fuels (coal, oil, natural gas). Back The Man-Made Greenhouse Effect Home CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 When cars, factories, and other man-made devices burn fossil fuels, they release air pollution. A major pollutant released is carbon dioxide (CO2). And this is how the greenhouse effect is out of balance. For centuries, CO2 has been accumulating in the atmosphere. This extra CO2 is trapping excess amounts of heat. The extra heat is causing the Earth’s climate to change. The man-made greenhouse effect is sometimes called global warming. Back Climate Change (Global Warming) Home Choose “allow content” for the YouTube video to play Why is Earth much warmer than the moon? Earth is much closer to the sun Earth has been struck by numerous meteors correct Earth has an atmosphere Since the Earth has an atmosphere, heat is trapped. Because air pollutants such as CO2 are accumulating in the atmosphere, the atmosphere is getting thicker. This means that extra heat is trapped. The fear is this could alter climate patterns around the world. This makes agriculture very difficult since climate affects how plants grow. If agriculture was disrupted, how would that affect the human population? correct The human population would decrease. The human population would increase. The human population would remain unchanged. Back Climate Change Solutions Home There is no one easy solution to climate change. Since our society demands so much energy, fossils fuels are the best way to provide the energy because of the lower cost. However, there are steps that everyone can take to help reduce the use of fossil fuels in their lives. The following steps help reduce the usage of fossil fuels. Back Climate Change Solutions Home There is no one easy solution to global warming. Since our society demands so much energy, fossils fuels are the best way to provide the energy because of the lower cost. However, there are steps that everyone can take to help reduce the use of fossil fuels in their lives. The following steps help reduce the usage of fossil fuels. Recycling helps to save natural resources. Back Climate Change Solutions Buy products with the “Energy Star” label. They require less energy to operate. Incandescent light bulbs get hot, which is wasted energy. Stop using them. Home Fluorescent light bulbs waste less energy and last longer. Buy them. There is no one easy solution to global warming. Since our society demands so much energy, fossils fuels are the best way to provide the energy because of the lower cost. However, there are steps that everyone can take to help reduce the use of fossil fuels in their lives. The following steps help reduce the usage of fossil fuels. Recycling helps to save natural resources. Using energy efficient products at home reduces pollution. Back Climate Change Solutions Home 78°F (or warmer) is recommended in the summer to save electricity. Every little bit helps. There is no one easy solution to global warming. Since our society demands so much energy, fossils fuels are the best way to provide the energy because of the lower cost. However, there are steps that everyone can take to help reduce the use of fossil fuels in their lives. The following steps help reduce the usage of fossil fuels. Recycling helps to save natural resources. Using energy efficient products at home reduces pollution. Turn up the air conditioning a few degrees in the summer. Or simply open the windows. Back Climate Change Solutions Home Don’t be lazy. Turn off that computer when not in use. There is no one easy solution to global warming. Since our society demands so much energy, fossils fuels are the best way to provide the energy because of the lower cost. However, there are steps that everyone can take to help reduce the use of fossil fuels in their lives. The following steps help reduce the usage of fossil fuels. Recycling helps to save natural resources. Using energy efficient products at home reduces pollution. Turn up the air conditioning a few degrees in the summer. Or simply open the windows. Turning off electronic products when not in use. Back Climate Change Solutions Home There is no one easy solution to global warming. Since our society demands so much energy, fossils fuels are the best way to provide the energy because of the lower cost. However, there are steps that everyone can take to help reduce the use of fossil fuels in their lives. The following steps help reduce the usage of fossil fuels. Recycling helps to save natural resources. Using energy efficient products at home reduces pollution. Turn up the air conditioning a few degrees in the summer. Or simply open the windows. Turning off electronic products when not in use. Carpooling. Walking short distances. Biking longer distances. Back The Ozone Layer Home High up in the stratosphere is an area called the ozone layer. The ozone layer protects life on the surface of the Earth because the ozone layer absorbs harmful ultraviolet (UV) radiation from the sun. Since the UV radiation is absorbed high in the sky, the UV never reaches the ground where people, plants, and other animals live. This is good. Back UV UV UV The Ozone Layer Home Did you know? Before the ozone layer existed, all life on Earth lived under water. Ozone layer prevents UV radiation from striking the Earth’s surface High up in the stratosphere is an area called the ozone layer. The ozone layer protects life on the surface of the Earth because the ozone layer absorbs harmful ultraviolet (UV) radiation from the sun. Since the UV radiation is absorbed high in the sky, the UV never reaches the ground where people, plants, and other animals live. This is good. Back UV So what’s the problem? UV UV Home UV UV UV Ozone layerThinner prevents UV radiation fromless striking the Earth’s surface ozone layer blocks UV radiation Human activity of course. Chlorofluorocarbons (CFC’s) are man-made chemicals used in refrigerators, aerosols, and solvents. These CFC’s are released into the air and drift up to the ozone layer. Sadly, CFC molecules react with ozone molecules. As a result, the ozone molecules are broken apart and thus can no longer absorb as much UV radiation. This allows more UV radiation to reach the surface. CFC CFC CFC CFC CFC CFC Back Effects of UV radiation Home UV radiation breaks apart DNA molecules UV radiation is a known mutagen, which means it causes DNA mutations. Due to this fact, UV radiation is harmful to all life on Earth, not just humans. The following is a partial list of problems caused by excess UV radiation from the sun. Back Effects of UV radiation Home UV radiation is a known mutagen, which means it causes DNA mutations. Due to this fact, UV radiation is harmful to all life on Earth, not just humans. The following is a partial list of problems caused by excess UV radiation from the sun. Skin cancer around the world has greatly increased. Back Effects of UV radiation Home UV radiation is a known mutagen, which means it causes DNA mutations. Due to this fact, UV radiation is harmful to all life on Earth, not just humans. The following is a partial list of problems caused by excess UV radiation from the sun. Skin cancer around the world has greatly increased. Crops do not grow as well. Keep in mind the world population is increasing. Back Effects of UV radiation Home UV radiation is a known mutagen, which means it causes DNA mutations. Due to this fact, UV radiation is harmful to all life on Earth, not just humans. The following is a partial list of problems caused by excess UV radiation from the sun. Skin cancer around the world has greatly increased. Crops do not grow as well. Keep in mind the world population is increasing. Cataracts and other eye problems are rising. Back Effects of UV radiation Home UV radiation is a known mutagen, which means it causes DNA mutations. Due to this fact, UV radiation is harmful to all life on Earth, not just humans. The following is a partial list of problems caused by excess UV radiation from the sun. Skin cancer around the world has greatly increased. Crops do not grow as well. Keep in mind the world population is increasing. Cataracts and other eye problems are rising. Destruction of plankton, which is the basis of ocean food webs. Back How to lessen your exposure? Home Sunburn is the most obvious sign of too much sun. Too much sun triggers the growth of cancerous cells. There are easy steps you can take to help reduce your exposure to the sun. Back How to lessen your exposure? Home Sunburn is the most obvious sign of too much sun. Too much sun triggers the growth of cancerous cells. There are easy steps you can take to help reduce your exposure to the sun. Proper clothing like hats, long sleeves, and sunglasses help to block UV radiation. Back How to lessen your exposure? Home Sunburn is the most obvious sign of too much sun. Too much sun triggers the growth of cancerous cells. There are easy steps you can take to help reduce your exposure to the sun. Proper clothing like hats, long sleeves, and sunglasses help to block UV radiation. Use a sunscreen of at least SPF-30 when you plan to spend some time outside. Stop the CFC Madness Back Home Antarctica In the mid-1980’s, scientists were shocked to discover a hole in the ozone layer over Antarctica. Luckily Antarctica is uninhabited by people, but around the rest of the world the ozone layer was getting thinner also. So more UV radiation was striking the surface of Earth. Nations around the world saw this as a problem, and took action. Back Stop the CFC Madness Home In the mid-1980’s, scientists were shocked to discover a hole in the ozone layer over Antarctica. Luckily Antarctica is uninhabited by people, but around the rest of the world the ozone layer was getting thinner also. So more UV radiation was striking the surface of Earth. Nations around the world saw this as a problem, and took action. Over 150 nations signed the Montreal Protocol and agreed to reduce the use of CFCs. The Montreal protocol is considered one of the most successful treaties in history. Back Ozone Outlook Home Since CFC’s can stay harmful for about 100 years, the pollution we released in the 1970’s will be in the atmosphere for some time. But since the Montreal Protocol, CFC usage has been greatly reduced. This has allowed the ozone layer to naturally repair itself, but the final recovery of the ozone layer is expected to take several lifetimes. But we are on the right track. Back Acid Rain Home What goes up….must come down. We’ve all heard this expression and it is very fitting concerning this next topic, acid rain. Normally, rainfall is life sustaining as rain provides much needed water. But what if the rain water is polluted? Back Acid Rain Home What goes up….must come down. We’ve all heard this expression and it is very fitting concerning this next topic, acid rain. Normally, rainfall is life sustaining as rain provides much needed water. But what if the rain water is polluted? Examine the pH scale above. Notice that chemicals less than 7 are considered acids. Naturally, rain water is slightly acidic (pH of 5.6) due to chemicals commonly found in the air. These chemicals get washed down with the rain and cause rain to be slightly acidic. This is natural. So what is acid rain? What goes up? Back Home NOx SO2 Once again, humans and fossil fuels are the cause of this problem. When fossil fuels are burned in cars and factories, they release sulfur dioxide and nitrogen oxides into the air. Keep in mind that millions of cars and thousands of factories are releasing these pollutants every day. Back Must come down… Home sulfuric acid Nitric acid Now that the sulfur dioxide and nitrogen oxides are in the air, they combine with water in the air to form two acids…sulfuric acid and nitric acid. When it eventually rains, these acids will fall down and run into rivers, lakes, and streams. So even though rain is naturally acidic, these chemicals make rain super acidic (pH of 3-4). Back Damages from acid rain Home As rivers, lakes, and streams collect more acids, the water becomes more deadly. The acidic water has been blamed for frog deformities and can be deadly to fish, frogs, and other aquatic life. Back Damages from acid rain Home As rivers, lakes, and streams collect more acids, the water becomes more deadly. The acidic water has been blamed for frog deformities and can be deadly to fish, frogs, and other aquatic life. The sulfur and nitrogen in acid rain is harmful to human lungs and can lead to asthma or bronchitis. Back Damages from acid rain Home As rivers, lakes, and streams collect more acids, the water becomes more deadly. The acidic water has been blamed for frog deformities and can be deadly to fish, frogs, and other aquatic life. The sulfur and nitrogen in acid rain is harmful to human lungs and can lead to asthma or bronchitis. The acids in the soil can be absorbed through the roots of plants and trees and harm their growth. Back Damages from acid rain Home As rivers, lakes, and streams collect more acids, the water becomes more deadly. The acidic water has been blamed for frog deformities and can be deadly to fish, frogs, and other aquatic life. The sulfur and nitrogen in acid rain is harmful to human lungs and can lead to asthma or bronchitis. The acids in the soil can be absorbed through the roots of plants and trees and harm their growth. Acids can peel paint or wear down stone statues. Back Acid Rain Solutions Home Since the burning of fossil fuels is the cause of acid rain, the obvious solution is to reduce the use of fossil fuels. While this may be easier said than done, there are alternative energies that are less polluting. Many government programs exist to help consumers go solar at home. Encourage your parents to look into this great alternative. Back Acid Rain Solutions Home Avoid staring inside the fridge for long amounts of time Turn off the TV when not in use Wash full laundry loads Open the blinds Since the burning during of fossil the fuels is the cause of acid rain, the obvious solution is to reduce the useday ofand fossil fuels. While this may be easier said than done, there are turn off alternative energies exist to the lightsthat are less polluting. Many government programs Change the furnace help consumers go solar atDry home. Encourage parents to look wet clothes outside on your a laundry line filterinto once this a yeargreat alternative. Saving electricity at home reduces the amount of fossil fuels that are burned. Please help by turning off electronics when they aren’t being used. Here are a few more ideas to try at home. Be sure to share them with your folks. Back Deforestation Home As stated earlier, human overpopulation is the cause for many problems. Another such problem is called deforestation. Like the name implies, this is the clearing of forested land. Once cleared, the cleared land is often used to build housing or is converted into farmland to grow crops. As cities expand further and further into once wilderness areas, the animals living in these areas will be displaced. The plant-life is obviously destroyed as the land is cleared. Back Deforestation Home Paper rolls Lumber for building Many poor nations still burn wood to cook and heat their homes As stated earlier, human overpopulation is the cause for many problems. Another such problem is called deforestation. Like the name implies, this is the clearing of forested land. Once cleared, the cleared land is often used to build housing or is converted into farmland to grow crops. As cities expand further and further into once wilderness areas, the animals living in these areas will be displaced. The plant-life is obviously destroyed as the land is cleared. Around the world, there is a high demand for wood products. Wood is used as fuel, building supplies, and paper. So in order to meet the demand around the world, trees are cut down and sold as lumber. Back Why is deforestation harmful? Home Hopefully this is obvious. By destroying the habitats of wildlife this causes extinctions. Lets not forget that the vast majority of drugs used to treat illness come from chemicals found in plants and animals. So by causing the extinction of wildlife, we are losing an important tool to help fight disease. Back Why is deforestation harmful? Home Hopefully this is obvious. By destroying the habitats of wildlife this causes extinctions. Lets not forget that the vast majority of drugs used to treat illness come from chemicals found in plants and animals. So by causing the extinction of wildlife, we are losing an important tool to help fight disease. As humans move into areas that were once wilderness, animal attacks are on the rise. Back Why is deforestation harmful? Home Hopefully this is obvious. By destroying the habitats of wildlife this causes extinctions. Lets not forget that the vast majority of drugs used to treat illness come from chemicals found in plants and animals. So by causing the extinction of wildlife, we are losing an important tool to help fight disease. As humans move into areas that were once wilderness, animal attacks are on the rise. Food chains and food webs become out of balance. Examine the food web above. What would probably happen to these organisms if the trees were destroyed and cut down? They would continue to The rest may go extinct since survive just fine there are no producers left correct Back How to help prevent Deforestation? I’m sure you know some ways to help reduce the use of wood products. Recycle…recycle…recycle! Home Back How to help prevent Deforestation? Home I’m sure you know some ways to help reduce the use of wood products. Recycle…recycle…recycle! When possible, look into purchasing 2nd hand furniture. Often, older furniture is even built to better standards and will last longer. Back How to help prevent Deforestation? Home I’m sure you know some ways to help reduce the use of wood products. Recycle…recycle…recycle! When possible, look into purchasing 2nd hand furniture. Often, older furniture is even built to better standards and will last longer. Try and go paperless at home. Sign up for e-bills. Remove your name from “junk mail” distributors. Back How to help prevent Deforestation? Home I’m sure you know some ways to help reduce the use of wood products. Recycle…recycle…recycle! When possible, look into purchasing 2nd hand furniture. Often, older furniture is even built to better standards and will last longer. Try and go paperless at home. Sign up for e-bills. Remove your name from “junk mail” distributors. Speak out to your local and federal representatives. They can help to create new laws to protect the environment. Back How to help prevent Deforestation? Home I’m sure you know some ways to help reduce the use of wood products. Recycle…recycle…recycle! When possible, look into purchasing 2nd hand furniture. Often, older furniture is even built to better standards and will last longer. Try and go paperless at home. Sign up for e-bills. Remove your name from “junk mail” distributors. Speak out to your local and federal representatives. They can help to create new laws to protect the environment. Support various environmental action groups such as GreenPeace or the Sierra Club. Back Conclusion Home So it is clear that many environmental problems exist today. It is also clear the human activity is the leading cause. Humans are releasing the pollution that causes the ozone problem, acid rain, and global warming. Human actions are behind deforestation. So now is the time to act. Back Conclusion Home So it is clear that many environmental problems exist today. It is also clear the human activity is the leading cause. Humans are releasing the pollution that causes the ozone problem, acid rain, and global warming. Human actions are behind deforestation. So now is the time to act. It starts with local action and changes at home. Spread the word to your family members about ways to help lessen the impact that humans have on the environment. Education is the key to reversing this trend and it starts with you. Back Quick Quiz #1 Home Correct Which is not a fossil fuel? Coal Wood Natural gas Oil Quick Quiz #2 Back Which climate altering gas is released from the burning of fossil fuels? Correct Nitrogen oxide CFC’s Carbon dioxide Sulfur dioxide Home Back Quick Quiz #3 Home Which man-made molecule is responsible for the destruction of the ozone layer? Nitrogen oxide CFC’s Carbon dioxide Sulfur dioxide Correct Back Quick Quiz #4 Home What is happening as a result of the thinning of the ozone layer? Rivers and lakes are more acidic The Earth is warming Forests are being cleared More UV radiation is striking Earth Correct Back Quick Quiz #5 Home What is considered to be the most serious environmental threat? Global warming Ozone layer destruction Acid rain Overpopulation Correct Back Quick Quiz #6 Home The pollutants that lead to acid rain come from which? Increase in Earth’s temperature Fossil fuel burning The use of aerosol can sprays Extra amounts of UV radiation Correct Quick Quiz #7 Back Which is an immediate threat to the habitat of living organisms? Correct Deforestation Greenhouse effect Acid rain Ozone depletion Home Quick Quiz #8 Back Sulfur dioxide and nitrogen oxide are related to which problem? Correct Ozone destruction Deforestation Acid rain Global warming Home Back Quick Quiz #9 Home Recycling and saving resources is a way to help which? Ozone destruction Greenhouse effect Acid Rain All of these Correct Quick Quiz #10 Back The Montreal Protocol helped to reduce the amount of which? Correct CFCs used In industry Acids released into lakes Wood cutting Carbon dioxide in the air Home Back Home Be sure to turn in your worksheet when finished. Climate Change Why is Earth much warmer than the moon? Earth is much closer to the sun Error The Earth and the moon are about the same distance to the sun. In fact, as the moon revolves around the Earth sometimes it is even closer. Try Again Climate Change Moon craters Earth crater Why is Earth much warmer than the moon? Earth has been struck by numerous meteors Try again It is true that Earth has been struck by a countless number of meteors, but so has the moon. You can see the craters left behind in this picture of the moon. So if meteor impacts made the Earth warm, then the moon should be warm also. But the moon is not warm. Try Again Climate Change If agriculture was disrupted, how would that affect the human population? Error The human population would increase. Think about this. People need food. If our ability to make food was disrupted, humans would have more trouble feeding ourselves. Try Again Climate Change If agriculture was disrupted, how would that affect the human population? Error The human population would remain unchanged. Think about this. People need food. If our ability to make food was disrupted, humans would have more trouble feeding ourselves. Try Again Why is deforestation harmful? Food chains and food webs become out of balance. Examine the food web above. What would probably happen to these organisms if the trees were destroyed and cut down? Error They would continue to survive just fine If the trees are gone, the herbivores would slowly starve. If the herbivores starve and die, then the carnivores would have nothing to eat. Try Again Quick Quiz #1 Which is not a fossil fuel? Error Coal Fossil fuels like coal, petroleum (oil), and natural gas are organic compounds found in the Earth’s crust. They are created from the remains of plants and animals that lived millions of years ago. According to the US Energy Information Administration (EIA), fossil fuels meet around 82% of U.S. energy demand. Try Again Quick Quiz #1 Which is not a fossil fuel? Error Natural gas Fossil fuels like coal, petroleum (oil), and natural gas are organic compounds found in the Earth’s crust. They are created from the remains of plants and animals that lived millions of years ago. According to the US Energy Information Administration (EIA), fossil fuels meet around 82% of U.S. energy demand. Try Again Quick Quiz #1 Which is not a fossil fuel? Oil Fossil fuels like coal, petroleum (oil), and natural gas are organic compounds found in the Earth’s crust. They are created from the remains of plants and animals that lived millions of years ago. According to the US Energy Information Administration (EIA), fossil fuels meet around 82% of U.S. energy demand. Try Again Error Quick Quiz #2 Which climate altering gas is released from the burning of fossil fuels? Error Nitrogen oxide Nitrogen oxides are in the air, and when they combine with water they create nitric acid. When it eventually rains, nitric acids will fall down and run into rivers, lakes, and streams. Nitrogen oxides create acid rain. Try Again Quick Quiz #2 Which climate altering gas is released from the burning of fossil fuels? CFC’s UV Thicker ozone layer Error UV Thinner ozone layer Chlorofluorocarbons (CFC’s) are man-made chemicals used in refrigerators, aerosols, and solvents. CFC’s are released into the air and drift up to the ozone layer. CFC molecules react with ozone molecules and causes them to broke apart. This allows more UV radiation to reach the surface. Try Again Quick Quiz #2 Which climate altering gas is released from the burning of fossil fuels? Sulfur dioxide Sulfur dioxides are in the air, and when they combine with water they create sulfuric acid. When it eventually rains, sulfuric acids will fall down and run into rivers, lakes, and streams. Sulfur dioxides create acid rain. Try Again Error Quick Quiz #3 Which man-made molecule is responsible for the destruction of the ozone layer? Error Nitrogen oxide Nitrogen oxides are in the air, and when they combine with water they create nitric acid. When it eventually rains, nitric acids will fall down and run into rivers, lakes, and streams. Nitrogen oxides create acid rain. Try Again Quick Quiz #3 Which man-made molecule is responsible for the destruction of the ozone layer? CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 Error Carbon dioxide When cars, factories, and other manmade devices burn fossil fuels, they release carbon dioxide (CO2). For centuries, CO2 has been accumulating in the atmosphere. This extra CO2 is trapping excess amounts of heat. The extra heat is causing climate change… not destroying the ozone layer. Try Again Quick Quiz #3 Which man-made molecule is responsible for the destruction of the ozone layer? Sulfur dioxide Sulfur dioxides are in the air, and when they combine with water they create sulfuric acid. When it eventually rains, sulfuric acids will fall down and run into rivers, lakes, and streams. Sulfur dioxides create acid rain. Try Again Error Quick Quiz #4 What is happening as a result of the thinning of the ozone layer? Error Rivers and lakes are more acidic Rivers and lakes are becoming more acidic due to acid rain, not the thinning ozone layer. Burning fossil fuels puts a lot of pollution into the air. Some of that pollution is acidic and falls back to Earth in the rain. Try Again Quick Quiz #4 What is happening as a result of the thinning of the ozone layer? Error Forests are being cleared Forests are being cleared because there is a large need for wood products. More and more forests are being cut down to make farmland and for building materials. Deforestation is not related to the thinning ozone layer. Try Again Quick Quiz #4 What is happening as a result of the thinning of the ozone layer? The Earth is warming Error CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 The Earth’s climate is changing due to the extra CO2 being trapped in the atmosphere. The CO2 traps heat near the Earth’s surface where it cannot escape into outer space. Try Again Quick Quiz #5 What is considered to be the most serious environmental threat? Error Global warming Global warming and climate change is bad… very bad. But think what is causing climate change? The overall actions of humans is causing climate change and global warming. So there is a better answer. Try Again Quick Quiz #5 What is considered to be the most serious environmental threat? Error Acid rain is bad… very bad. But think what is causing acid rain? The overall actions of humans is causing acid rain. So there is a better answer. Try Again Acid rain Quick Quiz #5 What is considered to be the most serious environmental threat? Ozone layer destruction Ozone destruction is bad… very bad. But think what is causing ozone destruction? The overall actions of humans is causing ozone destruction. So there is a better answer. Try Again Error Quick Quiz #6 The pollutants that lead to acid rain come from which? Error Increase in Earth’s temperature CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 The temperature of the Earth is not a pollutant. The Earth’s temperature is increasing due to the burning of fossils fuels. Fossils fuel burning produces electricity, but it also releases a lot of CO2 into the air. Try Again Quick Quiz #6 The pollutants that lead to acid rain come from which? UV UV Error The use of aerosol can sprays Thicker ozone layer Thinner ozone layer Aerosol cans release CFC’s, which can thin and destroy the ozone layer. Aerosol cans and CFCs do not cause acid rain. Try Again Quick Quiz #6 The pollutants that lead to acid rain come from which? UV UV Extra amounts Error of UV radiation Thicker ozone layer Thinner ozone layer Extra UV radiation will reach the Earth’s surface when the ozone layer becomes thinner as you can see in the city on the right. The thinning ozone layer is caused by CFC molecules, not acid rain. Try Again Quick Quiz #7 Which is an immediate threat to the habitat of living organisms? Error Acid rain This is not a bad answer because acid rain is a threat to habitats. But acid rain takes time. One of the choices destroys habitats immediately. Try Again Quick Quiz #7 Which is an immediate threat to the habitat of living organisms? Greenhouse effect Error CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 The greenhouse effect naturally keeps Earth warm. That is good. The greenhouse effect is only a problem when humans put too much CO2 into the atmosphere by burning fossil fuels. This process takes time and does not destroy habitats immediately. Try Again Quick Quiz #7 Which is an immediate threat to the habitat of living organisms? UV UV Ozone depletion Thicker ozone layer Error Thinner ozone layer Extra UV radiation reaching the Earth’s surface when the ozone layer becomes thinner can destroy habitats but it takes time. It is not an immediate process. Try Again Quick Quiz #8 Sulfur dioxide and nitrogen oxide are related to which problem? Error UV Ozone destruction Thicker ozone layer UV Thinner ozone layer The ozone layer is destroyed by man-made chemicals called CFC, which are used in aerosol cans, refrigerators, and solvents. Sulfur dioxide and nitrogen oxides are not destroying the ozone layer. Try Again Quick Quiz #8 Sulfur dioxide and nitrogen oxide are related to which problem? Deforestation Error Forests are being cleared because there is a large need for wood products. More and more forests are being cut down to make farmland and for building materials. Sulfur dioxide and nitrogen oxide are not causing deforestation. Try Again Quick Quiz #8 Sulfur dioxide and nitrogen oxide are related to which problem? Global warming Error CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 CO2 The Earth’s climate is changing due to the extra CO2 being trapped in the atmosphere from the burning of fossil fuels. The CO2 traps heat near the Earth’s surface where it cannot escape into outer space. Sulfur dioxide and nitrogen oxides do not cause this. Try Again Quick Quiz #9 Recycling and saving resources is a way to help which? Error Ozone destruction It is true that recycling and saving resources can prevent ozone layer destruction, but there is a better choice. Try Again Go Green! Fluorescent light bulbs help to save energy. Quick Quiz #9 Recycling and saving resources is a way to help which? Error Acid Rain It is true that recycling and saving resources can prevent acid rain, but there is a better choice. Try Again Go Green! Fluorescent light bulbs help to save energy. Quick Quiz #9 Recycling and saving resources is a way to help which? Greenhouse effect Error It is true that recycling and saving resources can prevent the greenhouse effect, but there is a better choice. Try Again Go Green! Fluorescent light bulbs help to save energy. Quick Quiz #10 The Montreal Protocol helped to reduce the amount of which? UV Error Wood cutting Thinner ozone layer Hint: The Montreal Protocol has helped the ozone layer rebuild itself and become thicker. Therefore, the Montreal Protocol must ban the use of the chemicals that destroy the ozone layer. What are those chemicals called? Try Again Quick Quiz #10 The Montreal Protocol helped to reduce the amount of which? Acids released Error into lakes UV Thinner ozone layer Hint: The Montreal Protocol has helped the ozone layer rebuild itself and become thicker. Therefore, the Montreal Protocol must ban the use of the chemicals that destroy the ozone layer. What are those chemicals called? Try Again Quick Quiz #10 The Montreal Protocol helped to reduce the amount of which? UV Carbon dioxide in the air Error Thinner ozone layer Hint: The Montreal Protocol has helped the ozone layer rebuild itself and become thicker. Therefore, the Montreal Protocol must ban the use of the chemicals that destroy the ozone layer. What are those chemicals called? Try Again