1. Which of the following is an example of a renewable

energy source?

a) Coal

b) Natural gas

c) Solar power

d) Oil

Answer: c) Solar power

Rationale: Solar power is generated from the sun's energy

and is considered a renewable energy source because it is

continuously replenished.

2. The greenhouse effect refers to:

a) The process of plants converting sunlight into energy

b) The trapping of heat in the Earth's atmosphere by certain

gases

c) The formation of clouds that block sunlight from

reaching the Earth's surface

d) The production of oxygen by photosynthetic organisms

Answer: b) The trapping of heat in the Earth's atmosphere

by certain gases

Rationale: The greenhouse effect is a natural process where

certain gases, such as carbon dioxide and methane, trap

heat in the Earth's atmosphere. This process is necessary

for life on Earth, but human activities have led to an

enhanced greenhouse effect, causing global warming.

3. The primary source of air pollution caused by burning