Pollution worksheet interactive worksheet - Free Printable

Worksheet: Pollution

#### Part 1: Choose the correct answer from the options below. (1 mark each)

1. Which is NOT an example of a renewable resource?
- (a) coal
- (b) soil
- (c) trees
- (d) water

Explanation:
Renewable resources are those that can be replenished naturally over time, such as trees, soil, and water. Coal, on the other hand, is a fossil fuel and is classified as a non-renewable resource because it takes millions of years to form.

Answer: (a) coal

2. Which of the following groups produce chlorofluorocarbons (CFCs)?
- (a) refrigerators, televisions, air conditioners
- (b) air conditioners, fire extinguishers, televisions
- (c) microwaves, televisions, refrigerators
- (d) air conditioners, fire extinguishers, refrigerators

Explanation:
Chlorofluorocarbons (CFCs) are chemicals commonly found in older refrigerators, air conditioners, and fire extinguishers. They were widely used as coolants and propellants but have been phased out due to their harmful effects on the ozone layer.

Answer: (d) air conditioners, fire extinguishers, refrigerators

3. Which is NOT an example of conservation?
- (a) recycling cans
- (b) reusing plastic bags
- (c) throwing garbage in a bin
- (d) using less water

Explanation:
Conservation involves actions that help preserve natural resources and reduce waste. Recycling, reusing, and using less water are all examples of conservation. Throwing garbage in a bin without proper sorting or recycling does not contribute to conservation.

Answer: (c) throwing garbage in a bin

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#### Part 2: Fill in the blanks with an appropriate word from the box. (1 mark each)

The words provided in the box are:
- biodegradable
- vectors
- greenhouse effect
- conserve
- CFCs
- acid rain
- pollution

4. ________ happens when pollutants infect the environment.
Explanation:
When pollutants enter the environment, they cause harm and degradation, which is referred to as "pollution."

Answer: pollution

5. ________ is responsible for destroying the ozone layer (Stratosphere).
Explanation:
Chlorofluorocarbons (CFCs) are known to deplete the ozone layer by breaking down ozone molecules in the stratosphere.

Answer: CFCs

6. ________ is produced when pollutants mix with water vapor in the air.
Explanation:
When certain pollutants (such as sulfur dioxide and nitrogen oxides) combine with water vapor in the atmosphere, they form acidic compounds, leading to "acid rain."

Answer: acid rain

7. The trapping of heat in the atmosphere is called the _________.
Explanation:
The phenomenon where greenhouse gases trap heat in the Earth's atmosphere, leading to global warming, is known as the "greenhouse effect."

Answer: greenhouse effect

8. Animals that carry diseases are called _________.
Explanation:
Animals that transmit diseases to humans or other animals are referred to as "vectors." For example, mosquitoes are vectors for diseases like malaria.

Answer: vectors

9. When you _________, you use natural resources wisely.
Explanation:
Using natural resources wisely means managing them sustainably, which is the concept of "conservation."

Answer: conserve

10. ________ items such as plastic bags and aluminum cans cannot decompose.
Explanation:
Items that do not break down naturally in the environment are described as "non-biodegradable." Plastic bags and aluminum cans fall into this category.

Answer: biodegradable

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Final Answers:

1. (a) coal
2. (d) air conditioners, fire extinguishers, refrigerators
3. (c) throwing garbage in a bin

4. pollution
5. CFCs
6. acid rain
7. greenhouse effect
8. vectors
9. conserve
10. biodegradable

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Boxed Final Answer:

\boxed{
\begin{array}{l}
1. \text{(a) coal} \\
2. \text{(d) air conditioners, fire extinguishers, refrigerators} \\
3. \text{(c) throwing garbage in a bin} \\
4. \text{pollution} \\
5. \text{CFCs} \\
6. \text{acid rain} \\
7. \text{greenhouse effect} \\
8. \text{vectors} \\
9. \text{conserve} \\
10. \text{biodegradable} \\
\end{array}
}