1. Some forms of fuel can be used in cooking such as............. ,................ and .............
wood ,coal and natural gas
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2. The electric generator changes ..............energy into................ energy.
kinetic to electric
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3. Using the ...................resources of energy is more expensive than using fossil fuel
renewable
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4. Different forms of fuel can be classified into two main types which are ..............and ...........
biofuel - fossil fuel
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Correct: 1. Fuel is the matter that produces (electrical )energy on burning.
thermal
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2. Wood is a form of( fossil fuel,) that can be used in houses
biofuel
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3. Hydroelectrical energy, is used to produce (water) from waterfalls and dams.
electricity
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4. Gases emitted from burning fossil fuel always (clear) the air.
pollute
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What happens if ... ? We use renewable resources of energy instead of fossil fuel. (according to Earth's temperature)
the earth's temperature will not increase
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Put (✓) or (x) : 1. Wind energy will run out faster than natural gas.
false
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2. Turning off lights that we do not need, is a way to conserve electricity.
true
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3. We can make liquid biofuel from wood chips and grass.
true
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4. As the speed of the car increases, the amount of used fuel decreases.
false
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Choose the correct answer : 1. Coal is formed under the Earth's surface from the remains of ............ a. dead animals. c. dead humans. b. dead plants. d. dead insects.