4. Observe the change in the strawberries below and answer these questions.
Wear a mask when you observe mouldy food. Wear gloves or use tools instead of your hands when you touch mouldy food.
1
2
after some time
fresh strawberries
mouldy strawberries
(1) After leaving the strawberries out for some time, what do they look like? (2) Touch the mouldy strawberries. How has their texture changed? (3) Do the mouldy strawberries produce new matter?
5. Discuss in groups. Give more examples of decaying matter.
2
1
Decayed food is bad for health. Do not eat it!
spoiled milk with a sour taste
decayed leaf
Changes that produce new matter are chemical changes. e
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