EASY
8th CBSE
IMPORTANT
Earn 100

Why is ozone layer important?

Important Questions on Pollution: A Global Threat

MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 18 - Pollution: A Global Threat>Put on your thinking cap>Q 7
Explain the greenhouse effect.
EASY
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 18 - Pollution: A Global Threat>Put on your thinking cap>Q 7
How does agricultural waste cause water pollution?
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 18 - Pollution: A Global Threat>Put on your thinking cap>Q 8
What is acid rain? How does it occur? Discuss its effects.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 18 - Pollution: A Global Threat>Put on your thinking cap>Q 8
State any five steps taken by the Government of Delhi to check air pollution.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 18 - Pollution: A Global Threat>Put on your thinking cap>Q 8
Explain how wastes from industries and agricultural run-off cause water pollution.
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 18 - Pollution: A Global Threat>Extended learning>Q 1

Find the given words in the grid.
PBrush

Pollution Nitrogen oxides
Carbon monoxide Fossil fuels
Petrol Lead
Ozone Sulphur dioxide
MEDIUM
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 18 - Pollution: A Global Threat>HOTS>Q 1
Explain why clear-looking water may not always be suitable for drinking.
HARD
8th CBSE
IMPORTANT
Galaxy A Course in Science Book 8>Chapter 18 - Pollution: A Global Threat>HOTS>Q 3
Oil spill is a major problem in the oceans and seas. Why?