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