guess the emoje
cow boy
2.
d. oil and coal
3. We can make liquid biofuel from wood chips and grass.
true
3. Hydroelectrical energy, is used to produce (water) from waterfalls and dams.
electricity
Correct: 1. Fuel is the matter that produces (electrical )energy on burning.
thermal
2. The electric generator changes ..............energy into................ energy.
kinetic to electric
2. Wood is a form of( fossil fuel,) that can be used in houses
biofuel
3.
c. green plants
the emojie
sun glasses
4. As the speed of the car increases, the amount of used fuel decreases.
false
4. Gases emitted from burning fossil fuel always (clear) the air.
pollute
3. Using the ...................resources of energy is more expensive than using fossil fuel
renewable
Give a reason for the following : Cutting trees to obtain wood has negative effects on the environment.
because rapid cutting causes deforestation
4. Different forms of fuel can be classified into two main types which are ..............and ...........
biofuel - fossil fuel
Put (✓) or (x) : 1. Wind energy will run out faster than natural gas.
false
1. Some forms of fuel can be used in cooking such as............. ,................ and .............
wood ,coal and natural gas
what is the emoje ?
angry bird
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.
b- dead plants
4
d. rain water
2. Turning off lights that we do not need, is a way to conserve electricity.
true
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