Chlorofluorocarbons cause_____.

Important Questions on Pollution of Air and Water

EASY

8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 18 - Pollution of Air and Water>ASSESSMENT ZONE>Q A

Acid rain is caused due to

EASY

8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 18 - Pollution of Air and Water>ASSESSMENT ZONE>Q A

Which of these help in absorbing UV rays?

EASY

8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 18 - Pollution of Air and Water>ASSESSMENT ZONE>Q B

Air contains $0.03\%$ of _____ and it is normally not considered a pollutant. (Carbon dioxide/ Sulphur dioxide/ Oxygen)

EASY

8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 18 - Pollution of Air and Water>ASSESSMENT ZONE>Q B

Smog causes diseases such as emphysema, bronchitis and _____. (Pneumonia/Asthma)

EASY

8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 18 - Pollution of Air and Water>ASSESSMENT ZONE>Q B

Power plants use water and then return the hot water into the water bodies. This is called _____. (Thermal pollution/ Land pollution)

EASY

8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 18 - Pollution of Air and Water>ASSESSMENT ZONE>Q B

_____ is the method in which the water passes to the layers of gravel sand and charcoal.

EASY

8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 18 - Pollution of Air and Water>ASSESSMENT ZONE>Q C

Oil spillage in water endangers the life of marine plants and animals.

EASY

8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 18 - Pollution of Air and Water>ASSESSMENT ZONE>Q C

Excess growth of weeds and algal bloom is called eutrophication.