Worksheet 28

Evaluation:

Circle the correct answers.

1. What cause waste to decay?

A. Pesticides

B. Flash floods

C. Toxic gases

D. Microorganisms

2. Which of the following statements is not true?

A. Waste that do not decay are biodegradable

B. Some microorganisms cause waste to decay

C. Some waste can decay, while others do not

D. Examples of waste that can decay are vegetables and plants

3. Which is the most suitable way to handle used plastic containers?

I. Burn

II. Bury

III. Reuse

IV. Recycle

A. I and II

B. II and IV

C. III and IV

D. I, II and III

Fill in the blanks with the correct answer.

	biodegradable		nutrients		Microorganisms		non-biodegradable

1.( ) cause some waste to decay.

2. Some waste return( ) to the soil.

3. The waste that can decay is( ) .

4. The ( ) waste cannot decay when buried.

Choose the true or false for the statements below

1. Microorganisms cause all waste to decay.

True

False

2. Biodegradable materials can be decayed by microorganisms.

True

False

3. During the decaying process, nutrients are returned to the soil.

True

False

4. Metal tins and plastic containers are not waste because they cannot decay.

True

False

5. All waste can decay and need to be disposed of properly.

True

False