Download Types of Energy - Cardiff International School Dhaka

Cardiff International School Dhaka (CISD)
Lost Class Make Up Assignment
Class: 4
Subject: IPC
Date: 22 (Sunday)-28 (Saturday) February 2015
Total Mark- 20
Instructions: All of your assignment must be done in A4 size paper. Mention your Name,
Class, Roll and Section clearly on the top sheet of your assignment.
Submission Deadline: Saturday 1 March 10.00 AM to the respective subject teacher. The
deadline is strict.
Name:.........................................................................................................................................................
Class: ................................Roll#........................Sec:..................Teacher: .............................................
Sunday-Saturday
22-28 February 2015
Sunday
IPC (Social Studies)
Topics: Black Gold
Tasks: Learn different types of energy.
Types of Energy
Energy is the power we use for transportation, for heat and light in our homes and for the manufacture of all kinds of
products. There are two sources of energy: renewable and nonrenewable energy.
Nonrenewable Sources of Energy
Most of the energy we use comes from fossil fuels, such as coal, natural gas and petroleum. Uranium is another
nonrenewable source, but it is not a fossil fuel. Uranium is converted to a fuel and used in nuclear power plants. Once
these natural resources are used up, they are gone forever.
The process of gathering these fuels can be harmful to the biomes from which they come. Fossil fuels are put through
a process called combustion in order to produce energy. Combustion releases pollution, such as carbon monoxide and
sulfur dioxide, which may contribute to acid rain and global warming.
Renewable Sources of Energy
Renewable sources of energy can be used over and over again. Renewable resources include solar energy,
wind, geothermal energy, biomass and hydropower. They generate much less pollution, both in gathering
and production, than nonrenewable sources.
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Solar energy comes from the sun. Some people use solar panels on their homes to convert sunlight into
electricity.
Wind turbines, which look like giant windmills, generate electricity.
Geothermal energy comes from the Earth's crust. Engineers extract steam or very hot water from the Earth's
crust and use the steam to generate electricity.
Biomass includes natural products such as wood, manure and corn. These materials are burned and used for
heat.
Dams and rivers generate hydropower. When water flows through a dam it activates a turbine, which runs
an electric generator.
Monday
Topics: Black Gold
Task: Learn these questions answer.
Q.1. What is renewable energy?
Ans: Energy exists freely in nature. Some of them exist infinitely (never run out, called RENEWABLE), the rest have
finite amounts (they took millions of years to form, and will run out one day, called NON-RENEWABLE)
With this in mind, it is a lot easier to lay any type of energy source in its right place. Let's look at these types of
energy in the diagram below:
that water, wind, sun and biomass (vegetation) are all available naturally and were not formed. The others do not
exist by themselves, they were formed. Renewable energy resources are always available to be tapped, and will not
run out. This is why some people call it Green Energy.
Q.2. What is biomass energy?
Ans : Biomass fuels come from things that once lived: wood products, dried vegetation, crop residues, aquatic plants
and even garbage. It is known as 'Natural Material'. As the plants died, the energy is trapped in the residue. This
trapped energy is usually released by burning and can be converted into biomass energy.
Q.3. What is wind power?
Ans: Wind is caused by huge convection currents in the Earth's atmosphere, driven by heat energy from the Sun.
This means as long as the sun shines, there will be wind.
Q.4. What is geothermal energy?
Ans: Geothermal energy is a renewable energy source because the water is replenished by rainfall, and the
heat is continuously produced by the earth.
Q.5. What is Hydro (water) energy?
Ans: Moving water has kinetic energy. This can be transferred into useful energy in different ways. Hydroelectric
power (HEP) schemes store water high up in dams. The water has gravitational potential energy which is released
when it falls.
Q.6. What is solar energy?
Ans: Solar power is energy from the sun and without its presence all life on earth would end. Solar energy has been
looked upon as a serious source of energy for many years because of the vast amounts of energy that are made
freely available, if harnessed by modern technology.
Wednesday
Topics name: Black Gold
Task : Learn this question answer:
Q. Where Does Renewable Energy Come From?
Wind Energy
Wind energy costs about the same as electricity from new coal- and gas-fired power plants.
And it's pollution-free.
Solar Energy
Inexhaustible and cheaper than ever, solar energy now powers everything from portable
radios to homes, stores and neighborhoods.
Biomass Energy and Cellulosic Ethanol
Plant materials, such as wood, corn, and soy, account for nearly half the renewable energy in
America -- but it's not always sustainable.
Biogas Energy
Farmers can reduce pollution and generate their own heat and electricity by converting
animal waste into a clean-burning gas.
Geothermal Energy
Reservoirs of steam and hot water beneath the earth's surface hold enormous potential as a
renewable energy resource.
Hydropower
Energy from moving water is the largest source of renewable electricity in the United States.
While water is a renewable resource, rivers themselves are not.
IPC (Social studies)
Thursday
Topic: Black Gold
Task: Learn this fill in the gaps.
Fill in the gaps:
1.______________________ is the form of energy obtained from non-exhaustible resources.
2. Energy from the__________ is called solar energy.
3.____________(oil, coal and natural gas) are not sustainable energy sources.
4. Solar power benefits do not require direct sunlight or a particular _______________.
5. Wind energy costs about the same ______________ from new coal- and gas-fired power plants.
And it's pollution-free.
6. Moving water has ____________ energy.
7. The water has ______________ potential energy which is released when it falls.
8. Biomass is ______________ derived from living, or recently living organisms.
9. Geothermal energy is from ______________ generated and stored in the Earth.
10. ____________________ and geothermal electricity produced at favourable sites are now the
cheapest way to generate electricity.
Q.1 What is solar energy?
Ans:
Answer
Topic: Black Gold
Task: Learn this fill in the gaps.
Fill in the gaps:
1. Sustainable energy is the form of energy obtained from non-exhaustible resources.
2. Energy from the sun is called solar energy.
3. Fossil fuels (oil, coal and natural gas) are not sustainable energy sources.
4. Solar power benefits do not require direct sunlight or a particular temperature.
5. Wind energy costs about the same as electricity from new coal- and gas-fired power plants. And
it's pollution-free.
6. Moving water has kinetic energy.
7. The water has gravitational potential energy which is released when it falls.
8. Biomass is biological material derived from living, or recently living organisms.
9. Geothermal energy is from thermal energy generated and stored in the Earth.
10. Hydro-electricity and geothermal electricity produced at favourable sites are now the cheapest
way to generate electricity.
Q..1 What is solar energy?
Ans: Solar energy is energy that is derived from the sun’s rays. The light and the heat provided by
the sun is “collected” or harnessed by solar panels and then converted into a more useful form of
energy. There are two main forms of solar energy – passive solar energy and active solar energy.
Help Lines:
For any assistance, please contact
1. Coordinator:
Ms Nazma Akter, Mob. No. +8804478882213
2. Lead Teachers:
Ms.Farzana, Mob.No. 01916869056
Ms. Rony,
Mob.No. 01741227190
3. Principal Head of School: G.M.Nizam Uddin, +88-01622181818,
[email protected]