Class 8 Practice – Level 1 – Pollution of Air and Water

Total questions: 40

What is the main cause of air pollution in urban areas?

Agricultural activities

Vehicle emissions

Forest fires

Volcanic eruptions

None

Which of the following is a common pollutant found in water bodies?

Oxygen

Mercury

Salt

Carbon dioxide

None

What is a common health effect of prolonged exposure to air pollution?

Increased energy

Improved lung function

Headaches

Enhanced vision

None

Which activity is a major contributor to water pollution?

Swimming

Watering plants

Industrial waste disposal

Fishing

None

Which of the following is an effective way to reduce air pollution?

Using public transport

Burning plastic

Increasing industrial output

Using more fossil fuels

None

What is the best practice to conserve water at home?

Taking long showers

Leaving the tap running while brushing

Collecting rainwater

Using more water for cleaning

None

What does the term "smog" refer to?

A type of fog

Clear sky

Smoke combined with fog

Rainy weather

None

What is a common effect of oil spills in water?

Increased fish population

Water becoming cleaner

Death of marine life

Enhanced water clarity

None

What is one of the main purposes of using air filters in homes?

To increase humidity

To decrease indoor air quality

To add odors

To remove pollutants

None

10.

What is thermal pollution?

Pollution caused by heavy metals

Pollution caused by excessive heat

Pollution caused by plastic waste

Pollution caused by chemicals

None

11.

What can be a consequence of drinking polluted water?

Waterborne diseases

Better digestion

Improved immunity

Enhanced metabolism

None

12.

Which gas is a significant contributor to the greenhouse effect?

Nitrogen

Oxygen

Carbon dioxide

Argon

None

13.

Which of the following is NOT a type of pollution?

Noise pollution

Light pollution

Air pollution

Mountain pollution

None

14.

Which of the following can lead to eutrophication?

Decreased sunlight

Excessive fertilizer runoff

Increase in dissolved oxygen

Removal of aquatic plants

None

15.

What is one way to improve air quality in cities?

Increasing the number of vehicles

Planting more trees

Using more fossil fuels

Closing parks

None

16.

Which of the following is a consequence of acid rain?

Fertile soil

Damage to aquatic ecosystems

Increased crop yield

Improved air quality

None

17.

Which of the following contributes most to air pollution from households?

Using electric appliances

Burning wood for heating

Opening windows

Using energy-efficient light bulbs

None

18.

Which household activity can contribute to water pollution?

Using pesticides in the garden

Taking a shower

Drinking water

Cooking

None

19.

What is one impact of air pollution on the environment?

Decreased cloud formation

Enhanced plant growth

Harm to wildlife

Increased sunlight

None

20.

Which of the following can help prevent water pollution?

Disposing chemicals down the drain

Using biodegradable products

Ignoring oil spills

Overusing fertilizers

None

21.

What is a common symptom of air pollution-related illness?

Increased appetite

Difficulty breathing

Clear skin

Stronger nails

None

22.

What is the purpose of chlorination in water treatment?

To remove heavy metals

To add nutrients

To improve taste

To kill bacteria and pathogens

None

23.

Which of the following is NOT a natural source of air pollution?

Volcanic eruptions

Wildfires

Factories

Dust storms

None

24.

What is the role of a catalytic converter in vehicles?

To increase fuel efficiency

To reduce exhaust emissions

To improve engine power

To increase noise

None

25.

Which human activity most directly contributes to plastic pollution in oceans?

Fishing

Littering

Swimming

Boating

None

26.

Which of the following can result from long-term exposure to air pollutants?

Reduced risk of asthma

Improved lung capacity

Better cardiovascular health

Chronic respiratory diseases

None

27.

Which of the following is a consequence of agricultural runoff?

Increased water clarity

Eutrophication

Decreased nutrient levels

Less water use

None

28.

Which instrument is used to measure air quality?

Barometer

Thermometer

Anemometer

Air quality monitor

None

29.

What is point source pollution?

Pollution that comes from many diffuse sources

Pollution that comes from a single, identifiable source

Pollution caused by sediment

Pollution that is invisible

None

30.

Which of the following is a potential effect of drinking contaminated water?

Increased energy levels

Healthy skin

Waterborne diseases

Enhanced digestion

None

31.

What can individuals do to help reduce air pollution?

Use more plastic bags

Walk or bike for short distances

Burn more waste

Increase car usage

None

32.

Which of the following is a major source of indoor air pollution?

Outdoor plants

Cooking and heating appliances

Open windows

Natural light

None

33.

Which of the following can be a solution to reduce plastic pollution in oceans?

Increasing plastic production

Promoting recycling

Ignoring the issue

Using more plastic products

None

34.

Which of the following is a potential effect of air pollution on plants?

Enhanced growth

Damage to leaves

Increased flowering

Better fruit production

None

35.

What does biological oxygen demand (BOD) indicate in water quality?

Level of dissolved salts

Amount of bacteria present

Organic matter content

Clarity of water

None

36.

Which of the following can result from oil spills in oceans?

Increased fish reproduction

Death of marine animals

Cleaner water

Enhanced coral growth

None

37.

Which of the following is a major cause of air pollution in rural areas?

Traffic

Agricultural practices

Factories

Household waste

None

38.

Which of the following practices can help prevent water pollution?

Disposing of waste in water bodies

Using septic tanks

Overusing fertilizers

Ignoring runoff

None

39.

What is the purpose of setting air quality standards?

To encourage pollution

To protect public health

To promote industrial growth

To reduce biodiversity

None

40.

What is the role of public awareness in preventing water pollution?

It has no effect

It helps individuals make informed choices

It increases pollution levels

It promotes wastefulness

None

1 out of 40

Time's up

Class 8 Practice – Level 1 – Pollution of Air and Water

Welcome back