Quiz 4 grade 4

Acid rain formed when ………………..combines with rain water.

• Oxygen gas

• Carbon dioxide gas

• Dust

• Sand

As the result of global warming the temperature on the earth decreases ................

• X

On burning fuel, we obtain .....................

• Sound energy

• Potential energy

• Thermal energy

• Electrical energy

Coal can be used to produce electrical energy ...................

• X

….is considered as the main source of energy on the Eath's surface

• Gasoline
• The Sun
• Natural gas
• The moon