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Unit 1&2 Book Scientific Method & Ecology Name __________ Period ____ 1 Unit 1 Key Understandings 1. ________________________________________________________________ ___________________________________________ 2. ________________________________________________________________ ___________________________________________ 3. ________________________________________________________________ ___________________________________________ Unit 2 Key Understandings 1. ________________________________________________________________ ___________________________________________ 2. ________________________________________________________________ ___________________________________________ 3. ________________________________________________________________ ___________________________________________ 4. ________________________________________________________________ 5. ________________________________________________________________ ___________________________________________ Unit 1 Vocabulary: Scientific Method 1. controls - factors in an experiment that are kept the same 2. dependent variable - the variable that is measured in an experiment 3. hypothesis - a tentative and testable statement that must be capable of being supported or not supported by evidence 4. independent variable - variable that is changed in an experiment 5. problem - scientific question that can be answered by experiment 6. repeated trials - the number of times an experiment is repeated for each value of the independent variable 7. science - the use of evidence to construct testable explanations and predictions of natural phenomena as well as the knowledge generated through this process 8. theory - a well-established and highly reliable explanation, but may be subject to change as new areas of science and technologies are developed 2 Unit 2 Vocabulary: Ecology 1. 2. 3. 4. 5. abiotic factor biotic factor carnivore carrying capacity physical, or nonliving, factor that shapes an ecosystem all the living things in an ecosystem organism that obtains energy by eating animals The maximum number of individuals of any species that can be supported by a particular ecosystem on a long-term basis commensalism the relation between two different kinds of organisms when one receives benefits from the other without damaging it 6. consumer an organism that obtains energy by feeding on other organisms 7. decomposer organism that breaks down and obtains energy from dead organic matter 8. detritivore organism that feeds on plant and animal remains and other dead matter 9. ecological pyramid A diagram that shows the biomass of organisms at each trophic level 10.ecological changes in the composition of species found in a community over time succession 11.ecosystem 12.ecosystem sustainability 13.food web 14.herbivore 15.limiting factors 16.mutualism a system formed by the interaction of a community of organisms with their physical environment the ability of an ecosystem to return to a state of equilibrium following a disturbance network of complex interactions formed by the feeding relationships among the various organisms in an ecosystem organism that obtains energy by eating only plants any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms 19.predation a relationship between two species in which both species benefit organism that obtains energy by eating both plants and animals symbiotic relationship in which one organism lives in or on another organism (the host) and consequently harms it interaction in which one organism captures and feeds on another organism 20.primary an organism that eats producers 17.omnivore 18.parasitism consumer 21.primary succession succession that occurs on surfaces where no soil exists an organism that makes its own food 23.secondary An organism that eats primary consumers consumer 24.secondary succession on a site where an existing community has been disrupted succession 25.symbiosis the relation between two different species of organisms that are interdependent 22.producer 26.tertiary 27.trophic consumer level An organism that eats secondary consumers position that organisms occupy in a food web, which is defined by its relationship to the primary energy source; each step in a food chain or food web 3 Extra Notes Page 4 Unit 1 - Scientific Method Steps of the Scientific Method Make an ___________________________ Ask a _______________________________ Form a ______________________________ Experiment o _________________ the Hypothesis Draw _____________________________________ o Hypothesis Valid or Invalid _______________________________ Results o Data Hypothesis or not slides class discussion. Do the hypothesis or not card activity. Write at least 2 examples from your cards of a hypothesis and not a hypothesis in the table. Hypothesis Not a hypothesis Developing a Hypothesis Observe something Ask a question Think of _______________________ and _______________________ Make it _________________________________ Is the Hypothesis Correct? You can tell if your original hypothesis was correct if the outcome is proven by the _____________________________________. _________________________ Supports your hypothesis What kinds of data can you collect? o _________________________ o _________________________ 5 How can you organize it? o ____________________, Charts, and Tables Data Support Activity on Smart board Sometimes Data is Odd… The Dread Tomato Addiction o by Mark Clifton o 92.4% of juvenile delinquents have eaten tomatoes. o 87.1% of the adult criminals in penitentiaries throughout the United States have eaten tomatoes. o Informers reliably inform that of all known American communists, 92.3% have eaten tomatoes. o 84% of all people killed in automobile accidents during the year 2006 had eaten tomatoes. Testing Promotional Claims Promotional Claim Example Product: Red Bull _____________________________________: “It Gives You Wiiiings” Hypothesis: If you drink Red Bull, you will grow wings Promotional Claim Example Procedure: o Gather 20 people, and place them into two equal groups. o One group will drink Red Bull, the other will drink water. o Observe both groups for 3 hours after drinking. o Record any sudden growth of wings. Independent Variable: People _____________________ Red Bull Dependent Variable: ________________________________________ Control: Group drinking ____________________ Discussion What is science? What is the difference between a hypothesis and theory? Are any of them unchangeable? 6 SCIENTIFIC THEORIES AND THEIR EVIDENCE Cell Theory What is Cell Theory? Cell Theory: o All living things are made up of ________ or ________ cells. All cells arise from _____________ cells. The cell is the basic unit of structure and ________________ for all organisms. Evidence: o First formulated in 1839 o Began from the work of three scientists: Schleiden, Schwann and Virchow o Has since been verified by 1,000’s of scientists Evolutionary Theory What is the theory of evolution? o Change in the ______________________ of a population across successive generations Evidence: o Work of Charles Darwin (Finches) o Fossil Record o _____________ Sequencing o Anatomical Similarities between life forms Gene Theory What is Gene Theory? o ______________ are passed from parent to offspring via genes. Evidence: o Work of _______________________ on pea plants and other organisms o 1,000’s of scientists, since Mendel’s time, have conducted experiments that confirm this theory o New DNA technologies continue to confirm this theory and help us learn more about the role of genes in some diseases. Germ Theory of Disease What is Germ Theory of Disease? o ___________________________ are the cause of some diseases. o Has led to important things such as antibiotics and good hygiene practices 7 Evidence: o Resulted from the work of numerous scientists, but is mainly attributed to the work of Louis Pasteur and Robert Koch o Microscopic observations and experimental evidence since late 1800’s continues to confirm this theory. Scientific Hypothesis or Scientific Theory? Instructions: Read each statement below. If you believe the statement is a scientific theory, place a check by the statement. _____ “Cells are the fundamental unit of life. New cells arise from existing cells.” _____ “People who earn a college degree will have a higher income.” _____ “If a woman takes one prenatal vitamin per day, her nails will grow longer.” _____ “The Earth’s surface layer has 7 large and 18 small plates. These plates move and interact in a variety of ways to cause the Earth’s seismic and volcanic activity.” _____ “All matter is made up of small units called atoms.” _____ “If a fish lives in water with pH levels below six, it will not survive.” _____ “If lemon juice is sprinkled over a cut apple, the apple will not turn brown.” _____ “Microorganisms are the cause of many diseases.” _____ “A gas is a large number of small particles that are all in random, constant motion.” _____ “The level of UV radiation from the Sun is highest between the hours of 10am and 2pm.” Scientific Method in Action The Strange Case of BeriBeri In 1887 a strange nerve disease attacked the people in the Dutch East Indies. The disease was beriberi. Symptoms of the disease included weakness and loss of appetite, victims often died of heart failure. Scientists thought the disease might be caused by bacteria. They injected chickens with bacteria from the blood of patients with beriberi. The injected chickens became sick. However, so did a group of chickens that were not injected with bacteria. One of the scientists, Dr. Eijkman, noticed something. Before the experiment, all the chickens had eaten whole-grain rice, but during the experiment, the chickens were fed polished rice. Dr. 8 Eijkman researched this interesting case and found that polished rice lacked thiamine, a vitamin necessary for good health. 1. State the Problem. 2. What was the hypothesis? 3. How was the hypothesis tested? 4. What is the independent variable? 5. What is the dependent variable? 6. What is the control? 7. Should the hypothesis be supported or rejected based on the experiment? 8. What should be the new hypothesis and how would you test it? How Penicillin Was Discovered In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. A clear area existed around the mold because all the bacteria that had grown in this area had died. In the culture dishes without the mold, no clear areas were present. Fleming hypothesized that the mold must be producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming transferred the mold to a nutrient broth solution. This solution contained all the materials the mold needed to grow. After the mold grew, he removed it from the nutrient broth. Fleming then added the nutrient broth in which the mold had grown to a culture of bacteria. He observed that the bacteria died which was later used to develop antibiotics used to treat a variety of diseases. 9. Identify the problem. 10. What was Fleming's hypothesis? 11. How was the hypothesis tested? 12. What is the independent variable? 13. What is the dependent variable? 14. What is the control? 15. Should the hypothesis be supported or rejected based on the experiment? 16. This experiment led to the development of what major medical advancement? 9 The Scientific Method - Plop Plop Fizz Fizz - Lab In this lab, you will develop and test a hypothesis, analyze data and draw conclusions. You are given guidance at each step of the way. Fill out this form completely - do not skip steps! Step 1: Question or Observation Question: What factors will make an alka-seltzer tablet dissolve faster Variables to test: .....Tap water, Warm water, Cold water, Salt Water, Acidic water (using vinegar) Of the variables above, which should serve as your CONTROL group? __________ In this experiment, the independent variable is the type of water (warm, salt..etc). What is the responding variable, or the thing you will be measuring? _________________ Step 2: Develop a hypothesis. Finish this statement… Alka seltzer will dissolve fastest in ______________ water, and the slowest in _________ water. Step 3: Design and Conduct and Experiment Answer these questions regarding your experimental design: 1. Will you use a whole tablet or a half a tablet of alka seltzer? ______________ 2. How will you measure how quickly it dissolves? ___________________________ 3. How much water will you place in your beakers? __________________________ a. Will this amount be the same in all of your tests? _______________ 4. What safety precautions should you take? _________________________________ 5. What is the independent variable? ____________________________________ 6. What is the dependent variable? ____________________________________ 7. What is the control? __________________________________________ 10 Step 4: Record your results in the table. Type of Water Dissolve Time Step 5: Draw Conclusions – in a complete sentence, answer your experimental question by summarizing the data Testing Promotional Claims Lab Directions: In your group, design an experiment to test your group’s promotional claim. On a piece of paper, follow the guidelines and design your experiment. Then show your work to the teacher to be able to get the equipment to test your experiment. Once you have your results, you will make a presentation on poster paper to present to the class. Guidelines to design your experiment: 1) Experiment Question 2) Your hypothesis (include reasoning) 3) Your experimental design i. Independent variable ii. Dependent variable iii. Control iv. Controlled variables (multiple) 4) Data you will collect 11 Groups’ experiments: 1. Oreo Cookie Challenge Do Double-Stuff Oreos actually have double the stuffing or regular oreos? Equipment: Scale, Beaker, Rulers, *Oreos and Double Stuff Oreos 2. Are Bounty paper towels more absorbant than generic paper towels? Equipment: Beaker, Graduated Cylinder, Scale, Rules, Water, Two types of towels 3. How does surface are of a candy affect how quickly it dissolves in water? Equipment: smarties or sweet tarts (or any sugary dissolvable candy that can be cut into smaller portions), water, ruler, scale, *scalpel or blade, timer 4. Many gum brands claim that they have the longest lasting flavor. Design and conduct an experiment to determine what type of gum has the longest lasting flavor. clock, a variety of different types of gum 5. Which type of polish remover works best, acetone or acetone free? fingernail polish, polish remover (2 types), dishes, lids, or other surfaces to paint on, variety is good so that students must consider the surface when conducting the experiment. Assessment: After your group has designed and preformed your experiment, then you will make a poster of your design, experiment, and results. The following needs to be included on your poster: 1) Experiment Question 2) Your hypothesis (include reasoning) 3) Your experimental design a. Independent variable b. Dependent variable c. Control d. Controlled variables (multiple) 4) Data you collected a. A graph showing your data 5) Your result (supported hypothesis or not) You will then present your results to the class. 12 Unit 2 - Ecology Levels of Organization in Ecology What is the correct level of organization (card sort activity) Populations vs. Communities What is the difference between a biological population and a biological community? o A biological population is a group of organisms, all of the _________________________, which interbreed and live in the same area at the same time, while a biological community is made of ________________________________in a certain time. Competition What is competition? o Competition is one of the many symbiotic relationships occurring in nature. Members of species compete for _______________, especially for ________________ natural resources. Examples? o trees that grow very close together vie for sunlight and soil nutrients, lions and tigers that vie for similar prey, and a farm of rice paddies with weeds growing in the field Competition What happens to competition between individuals as population size increases? o Competition will also_________________________. o If the demand for resources ______________ the supply, then the population size will eventually __________________________. 13 Limiting Factors Do populations often grow exponentially? What are limiting factors? o Limiting factors are any factors (things) that affect an organism’s ______ _________________________in its environment. These factors affect population growth. Examples? o availability of food and ____________, predators, temperature, space/shelter, and ________________________. Density-Dependent Factors What are density-dependent factors? o Factors that depend upon the _______________________________. These factors will have an increasing ___________ as the population size ______________________. Examples? o availability of food and water, competition, predators, and disease Density-Independent Factors What are density-independent factors? o Factors that are _______________________________ upon the size of the population and can affect any population. Examples? o temperature, weather (storms, floods, drought), and habitat disruption by humans Carrying Capacity – draw graph Carrying Capacity The _______________________ of individuals that an environment can support. o “Food Source Sustainability” Why is knowing carrying capacity important to ecologists? 14 Abiotic vs. Biotic Card Sort Write three examples for each category from the card sort. Abiotic Biotic Symbiotic Relationships Write 4 examples of each type of symbiotic relationship from the cards posted around the room. Commensalism Mutualism Parasitism Predation Definition: Definition: Definition: Definition: Faces Picture: Faces Picture: Faces Picture: Faces Picture: 15 Predator Prey Simulation Lab Objective: Students will simulate predator prey interactions using cards. The number of predator and prey in their “ecosystem” will be recorded and graphed which will show a predator prey cycle in an ecosystem. Materials (Prepared in advance) Each group will receive 200 small squares cut from index cards (approximately 1 inch squared) -- The small squares represent the prey population. Each group will receive 50 large squares cut from index cards (cut index cards in half) -- The large squares represent the predator population. Each group will receive a data table (prepared) and blank graph paper to graph the data. *It is possible to substitute other materials to represent prey and predators, such as beans, paper plates, foam squares, pennies..etc* Instructions: Your lab table or desk will represent your ecosystem (Please clear all objects, such as purses and backpacks) 1. Place 3 prey; on your table. 2. Toss 1 predator onto the table (evenly dispersed) and attempt to make the card touch as many prey; as possible. In order to survive, the predator must capture at least 3 prey. It will be impossible for your predator to survive at this point. 3. Remove any prey; captured and record your data for the 1st generation. 4. The prey population doubles each generation. Count how many prey (small squares) you have left on your table, double that number and add prey cards to the table. Record the number in the data table under the 2nd generation “number of prey staring”. (It should be 2x the number you have under the “hares remaining” for generation 1) 5. Your predator died during the first round, but that’s okay, a new predator moves in for the second round. Put a 1 in the “number of predators” for generation 2 to represent the new arrival. Repeat the tossing procedure and record your data for the second generation. 16 6. Again, number or prey doubles, if your predator didn’t “capture” 3 prey, it died. But a new one moves in for the next round. Keep going, adding to the number of prey each round. 7. Eventually your predator will be able to capture enough prey to survive. Guess what happens? The number of predators double. Add to your predator population by adding predator cards. Now when you toss your predators, you will be tossing more than one. Don’t forget to remove any “captured” prey. 8. Continue to record the data through 20 generations. Construct a graph. On the X-axis, put generations 1 through 20, on the Y-axis you will have the population numbers for each generation (number of predators, number of prey). Use one line for the predator and one line for the prey to graph the data. GENERATIONS 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th 20th # of Predators Starting # of Prey Starting # of Predators Remaining # of Prey Remaining Analysis 1. Describe what happens to the predator and the prey population as time goes by. 2. Make a prediction about what would happen to your prey population if a new predator is added to the system. 3. Explain how this simulation models a real ecosystem. 4. Name 2 other factors that could affect the populations of predators or prey. a. b. 17 Food Web 1. For the food web, label each organism: (Some may have more than one label) P = producer | 1 = Primary Consumer | 2= Secondary Consumer | 3 = Tertiary Consumer | | 4 Quartenary Consumer 2. Now label each animal as either a : H = herbivore C = carnivore O = omnivore 18 3. Create your own food web. You do not need to draw pictures, you could just write the words. Draw the arrows the correct direction!! Animals to put on your web: SHRIMP, PHYTOPLANKTON, HERRING, ZOOPLANKTON, JELLYFISH, SHARK, SEAL, and PENGUINS. 19 Is It True? Ecosystems and Energy Flow Instructions: Read each statement below, and decide if it is true or false based on your own background knowledge. In the blanks, mark “T” for true and “F” for false. After marking all of the statements as true or false, use the resources provided by your instructor to determine if you were correct. For any false statement, rewrite the statement to make it true. 1. ____ In ecosystems, producers are organisms that are autotrophic and generate their own energy. Consumers are organisms that obtain energy from feeding on other organisms or organic matter. 2. ____ A herbivore is a consumer that eats only meat. A herbivore is a consumer that eats only plants. 3. ____ A carnivore is a consumer that eats both plants and meat. A carnivore is a consumer that eats only meat. 4. ____ A detritivore is a consumer that feeds on dead organic material. 5. ____ An omnivore is a consumer that eats only plants. An omnivore is a consumer that eats both plants and meat. 6. ____ A decomposer is an organism that breaks down organic material. Examples include fungi and bacteria. 7. ____ A food chain represents many different feeding relationships within an ecosystem. 8. _____ Each organism in a food web or food pyramid is said to be at a specific trophic level with other organisms that have the same feeding habits. 9. _____ The graphic below is called an ecological pyramid. It is a graphical representation that shows the feeding relationship of a group of organisms and flow of energy or biomass through different trophic levels in a given ecosystem. 20 10. _____ When energy is transferred from one organism to the next in a food chain, food web, or food pyramid, 10% of the energy is lost and 90% of the energy is transferred. Therefore, an organism at the top of the food pyramid has almost all of the energy from all the organisms below it. 11. _____ An organism at the top of a food pyramid is a predator to all of the organisms beneath it. 12. _____ As a result of biological magnification, predators at the top of a food web or food pyramid may have very low levels of dangerous chemicals such as pesticides and mercury. The Carbon Cycle Carbon is an important element to living things. As we learned earlier, the most abundant substance in organisms is water. The second most abundant substance is carbon. Much of the solid portions of lifeforms is made up of great amounts of carbon. How do living things obtain carbon? Carbon is extracted from the atmosphere by plants through the process known as photosynthesis. This carbon is combined with other elements in complex ways to form organic molecules important to life. This carbon is later transferred to animals who consume, or eat plants. When plants and animals die, much of their carbon is returned to the atmosphere as the organisms decompose. Every so often, a plant or animal does not decompose right away. Their bodies are trapped in locations where decomposition can simply not take place. This is most common at the bottom of oceans and seas where the lifeforms become buried by sand. Instead of returning to the atmosphere, the carbon from these lifeforms is trapped within the Earth. Over millions of years, more and more of the carbon on Earth has been trapped in this manner. Today, almost 99% of all the carbon on Earth has been locked up deep within the Earth. As rocks weather, this carbon is slowly released back into the atmosphere, creating a balance. For the past several hundred million years, the amount of carbon being locked up in the Earth and the amount being released by weathering rocks was almost perfectly balanced. 21 This important balance has been altered significantly in the past century as humans have begun using fossil fuels to produce energy. By burning the Earth’s store of carbon, mankind is able to create the energy needed to operate our communities. However, we must be careful as we do so. By releasing more carbon into the atmosphere than is being locked up, we risk causing damage to the delicate carbon cycle. The Nitrogen Cycle Nitrogen is the most abundant element in our planet’s atmosphere. Approximately 78% of the atmosphere is comprised of this important element. Nitrogen is used by lifeforms to carry out many of the functions of life. This element is especially important to plant life. Yet, nitrogen in its gaseous form is almost entirely unusable to lifeforms. It must first be converted or ‘fixed’ into a more usable form. The process of converting nitrogen is called fixation. There are specialized bacteria whose function it is to fix nitrogen, converting it, so that it can be used by plants. There are still other bacteria who do the reverse. That is, they return nitrogen to is gaseous form. After nitrogen is fixed, it can be absorbed and used by plants, and subsequently by animals. The process of nitrogen being fixed, used by plants and animals, and later returned to the atmosphere is referred to as the nitrogen cycle. 22 Ecological Succession Examples of Changing Ecosystems A forest could have been a shallow lake a thousand years ago. Mosses, shrubs, and small trees cover the concrete of a demolished building. Ecological Succession ________________ process of change and replacement of the types of _____________________in a community. May take _____________ or ______________________of years. Newer communities make it _________________ for the older ones to survive. Example: Younger birch trees will have a harder time competing with taller, older birch trees for sun, but a shade loving tree may replace the smaller birch trees. Primary Succession Type of succession that occurs where there was ______ ecosystem before. Occurs on _______________, cliffs, and sand dunes. Primary succession is very _______________________. Begins where there is ______________________________. Takes several hundred years to produce fertile soil naturally. First species to colonize bare rock would be ____________________________. Lichens Do not require soil. Colorful, flaky patches. Composed of two species, a ____________ and an _________________. The algae photosynthesize and the fungi absorbs nutrients from rocks and holds water. Over time, they ____________________________________the rock. As the rocks breaks apart, water freezes and thaws on the cracks, which breaks up the rocks further. When the lichens die, they accumulate in the cracks. Then mosses begin to grow and die, leading to the creation of fertile soil. __________________________ is made up of the broken rocks, decayed organisms, water, and air. Secondary Succession More ______________________ 23 Occurs on a surface where an ecosystem has _______________________. Occurs on ecosystems that have been ____________________ or ____________________ by humans, animals, or by natural processes such as storms, floods, earthquakes, and volcanoes. Secondary Succession: Mt. St. Helens Erupted in 1980. 44,460 acres were ______________________ and flattened. After the eruption, plants began to colonize the volcanic debris. Pioneer species: the first organism to colonize any newly available area and begin the process of ecological succession. Over time, the pioneer species makes the area habitable by other species. Today, Mt. St. Helens in the process of secondary succession. Plants, flowers, new trees and shrubs have started to grow. If this continues, over time they will form a climax community. Climax community: the ___________________________ community. Climax community will continue to change in small ways, but left undisturbed, it will remain the same through ________________. Fire and Secondary Succession Natural fire caused by lightening are a _________________ part of secondary succession. Some species of trees (ex: Jack pine) can only release their seeds after they have been exposed to the intense heat of a fire. Minor forest fires remove brush and deadwood. Some animals depend on fires because they feed on the newly sprouted vegetation. Foresters allow natural fires to burn unless they are a ______________ to human life or property. Old-field Succession Occurs in farmland that has been ________________________. Grasses and weeds grow quickly, and produce many seeds that cover large areas. Over time, taller plants grow in the area, shading the light and keeping the pioneer species from receiving any light. The longer roots of the taller plants deprive the pioneer species from water. The pioneer species die. 24 Taller trees begin to grow and deprive the taller plants of water and light. Followed by slow growing trees (oaks, maples) takeover the area. After about a ____________________, the land returns to a _______________________ community. Succession Comic Strip You will be drawing, coloring and adding dialogue to 2 comic strips about your assigned “disturbance.” One will be on primary succession, and the other on secondary succession. Instructions: 1. Each comic strip must include 6 panels (scenes) 2. For Each comic strip: a. The 1st panel should show the assigned disturbance as it is occurring. b. The 2nd panel should show what the scene looks like after the disturbance has ended. c. The 3rd, 4th and 5th panels should show the seral stages, meaning the stages of regrowth that occur. d. The 6th panel should show the climax community. e. All scenes need to be colored. f. All scenes need to have written information about what is happening in terms of growth. Use your creativity and humor. Use a rock, plant or animal as your narrator, for example. NOTE: Remember that primary succession starts with bare rock with lichens and mosses as pioneer species. Secondary succession starts with soil already present. 25 Primary Succession: Secondary Succession: Disturbance____________________________________ Disturbance _________________________________ 26 Biomes Concept Map WORD BANK: elephant Northern Africa Eastern U.S. Lion moose Seasons squirrels farmland giraffe prairie dogs Central U.S. pine trees Canada reptiles monkeys rainfall dry climate Central Africa cactus equator canopy maple trees 27 Ecology Project Objective: You will create a power point presentation over one ecosystem to present to the class. Procedure: 1. Choose an ecosystem to research. (May be assigned to you) Make a slide for each of the following, answering the questions in depth. Don’t forget to add pictures, graphs, and graphics that relate to what the question is talking about. **All questions pertain to the ecosystem you choose.** 2. List seven abiotic and seven biotic factors 3. List three limiting factors that may affect carrying capacity. 4. List three organisms that have an adaptation, what that adaptation is, and how it helps them survive. 5. List 20 organisms that live in your ecosystem. The organisms should come from a variety of kingdoms (animal, plant, fungi, protist, bacteria). 6. Construct 3 food chains using the organisms you listed. Label the following on each food chain: a. Producer b. Primary consumer c. Secondary consumer d. Tertiary consumer e. Decomposer f. Detritivore g. Herbivores h. Carnivores i. Omnivores j. All tropic levels 7. Using your three food chains you already made, construct a food web that contains 12 organisms. 8. Name a symbiotic relationship – commensalism. 9. Name a symbiotic relationship – mutualism. 10. Name a symbiotic relationship – parasitism. 11. Name a predator – prey relationship. 12. Describe an example of competition. 13. Name a density – dependent factor that could affect the survival of an organism. 14. Name a density – independent factor that could affect the survival of an organism. 28 15. Construct an energy pyramid. a. Include 9 organisms in the pyramid b. Label each level with the correct tropic level c. Label each level with correct type of producer or consumer (primary, etc.) d. Assume the lowest level has 100,000 units of energy. Label the units of energy that will be transferred to the remaining levels. 16. Draw and label a carbon cycle for your ecosystem. 17. Draw and label a nitrogen cycle for you ecosystem. Released EOC Questions 29 30 Ecology Test Review 1. Name some organisms that act as decomposers in an ecosystem. 2. Put the following into the correct order, from smallest to largest: 3. Where does all energy within an ecosystem originate? 4. Define carrying capacity. 5. Draw and label a carrying capacity curve. 6. Define competition and give an example: 7. Define predation and give an example: 8. Define commensalism and give an example: 9. Define mutualism and give an example: 10. Define parasitism and give an example: 11. Define carbon cycle. 12. Briefly draw and label a carbon molecule as it goes through the carbon cycle. 13. Define Nitrogen cycle. 14. Briefly draw and label a nitrogen molecule as it goes through the nitrogen cycle. 31 15. Define hypothesis. 16. Define scientific theory. 17. Compare and contrast scientific theory and hypothesis 18. What are the steps of the scientific method? 19. Draw an energy pyramid. List the following on your energy pyramid: Animals, producer, primary consumer, secondary consumer, tertiary consumer, quarternary consumer. 20. How much energy is transferred from one level on the energy pyramid to another? 21. Define biomagnification. Where is it usually greatest in a food pyramid and why???? 22. Define primary succession. Give examples of how and when this occurs. 23. Give me an example of when scientific theories can change? What can cause these changes? 32