Biology

Q.

The ozone layer protects the environment by:

1. Not allowing sun rays to enter earth's atmosphere.

2. Not allowing harmful UV rays to enter earth's atmosphere.

3. Producing more oxygen.

4. Ozone layer is harmful for our environment.

Q.

The main source of carbon monoxide in the atmosphere is:

1. Vehicles

2. Industries

3. Bio wastes

4. Photochemical reactions in the troposphere.

Q.

The disposal of wastes that we generate is causing serious environmental problems.

1. True

2. False

Q.

What are the problems caused by the non-biodegradable wastes? [3 MARKS]

Q. Which of the following is not a biodegradable waste?

1. Human and animal waste
2. Electronic devices
3. Plant products
4. Paper

Q. Unchecked carbon pollution leads to long-lasting changes in our climate, such as:

1. Rising global temperatures/global warming
2. Rising sea level
3. Changes in weather and precipitation patterns
4. All of the above

Q. Cow dung is ___ waste.

1. Non-biodegradable
2. Biodegradable
3. Hazardous
4. Toxic

Q.

Brick Kiln is a natural source of air pollution

Q.

Brick Kiln is a natural source of air pollution

Q. Microorganisms do not help in biodegradation.

1. True
2. False