questions g4

The solar energy is converted into..... energy in greenhouse.

• Electrical

• Sound

• Thermal

• Potential

In the water cycle, the water evaporates then it condenses in form of....... And returns back through rain falling.

• Clouds

• Sand

• Rocks

• Coal

All the followings are renewable energy resources, except.............

• Waterfalls

• Coal

• The sun

• Wind

Both modern wind turbines & modern water turbines are similar in their........

• Shape

• Ability to generate electrical energy

• Blades number

• Ability to crush grains

Smog causes irritation of ........of humans.

• Stomach and eyes

• Eyes and lung

• Small intestine

• Large intestine

In the absence of the light of ............ living organisms cannot survive.

The difference in temperature between cold & hot air causes air to ..........

The ................ energy generated by water turbines in dams is known as hydroelectricity.