Materials that undergo decay

Which of these materials undergo decay?

• plastic

• tin cans

• banana peelings

• rubber

Materials that undergo decay are useful to our body?

• Yes

• No

• Maybe

Which material does not belong to undergo decay?

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Which material does not belong to undergo decay.

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Which material does not belong to undergo decay.

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How do we know if the material is decaying?

• It has a nice color

• It has a bad smell

• It has a good smell

• It has a lot of sauce

How do we know if the material is decaying?

• it is sweet

• it has a nice color

• It has worms

• it looks delicious

Which of the following DOES NOT contribute to the decaying process of materials?

• water

• sunlight

• glass

• soil

Some decaying materials can be useful

• true

• false

• all of the above

• none of he above

We put our food leftovers into the soil to make __________?

• another food

• plants

• perfume

• fertilizer