Environmental Science

Environmental Science Worksheet-4

1. How long does it take to convert decayed matter to turn into fossil fuels?

(a) Over thousands of years       (b) Over millions of years

(c) Over hundreds of years        (d) Over thousands of days

2. What is the nitrogen cycle?

(a) A process where nitrogen gas passes from air to ocean to glaciers and back to the air again.

(b) A process where nitrogen gas passes from air to soil to organisms and back to the air again.

(c) Conversion of Nitrogen into Proteins.

(d) Conversion of Proteins into Nitrogen.

Environmental Science Worksheet-5

1. How do plants get nitrogen in the nitrogen cycle?

(a) By photosynthesis

(b) By eating other plants

(c) By absorbing it from the soil

(d) By absorbing it from the air

2. In what form does the nitrogen stays in the soil?

(a) As pure nitrogen molecules

(b) As nitrogen carbide

(c) As a nitrogen containing substances called mineral

(d) As a nitrogen containing substances called nitrates

Environmental Science Worksheet-6

1. Which layer of gas in the atmosphere protects the Earth from the Sun's UV rays?

(a) Nitrogen layer                         (b) Anti UV layer

(c) Ozone layer                              (d) Infrared layer

2. What is the smog pollution made of?

(a) Coal and Air                            (b) Coal and water vapor

(c) Air and water vapor              (d) Smoke and fog