An example of the renewable energy is ...........
oil
wind
The output of solar panels is.......................
photo
electricity
Using curved ......... in cooking food is one of the benefits of using the solar energy.
mirrors
wood
Both modern wind turbines and old windmills are similar in their.....
function
blades number
When wind ......... energy increases, the windmill blades spin faster.
chemical
kinetic
Acid rain is formed when ..........combines with rain water.
oxygen
carbon dioxide
The form of energy resulted from waterfalls is called ...... energy.
hydroelectric
solar
The power source for the electric fan is ...............
Hydroelectric power is produced using ..................
water
Solar energy is used in ...........................
food preservation
cooking food
In water turbines, the ........ energy of water is changed into electrical energy.
light
The source of all energies on earth is ..................
The sun
planets
Modern wind turbines are................. the old vacuum mills
shorter than
longer than
The sun’s energy is produced from a gaseous reaction.
Hydrogen and Helium
Nitrogen
Cars smog causes irritation of ...... of human.
the eye
the small intestine