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Question
Find out the reason for these changes. From where did the fungus come on the bread?
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Solution
These changes occurred because of rotting of bread. The spores of fungus are present in the air. When they get a moist surface and food, they begin to grow.
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RELATED QUESTIONS
Have you ever seen some food that has got spoilt? How did you know that it was spoiled?
Look in your kitchen and write down names of food items that
| can get spoilt in 2-3 days | ______ | ______ | ______ |
| can be kept for a week | ______ | ______ | ______ |
| would not spoil till one month | ______ | ______ | ______ |
Look carefully at two-three packets of food items:
When you buy anything from the market, what do you look for on the packet?
The whole class can do this experiment together. Take a piece of bread or roti. Sprinkle a few drops of water on it, and put it in a box. Close the box. See the bread or roti every day until you find some changes on it.
Make this table on chart paper and put it up in the classroom. Fill up the chart every day after discussing the changes seen.
| Day | Changes in the bread or roti | |||
| By touch | By smell |
By looking through hand lens |
By colour | |
| 1. | ||||
| 2. | ||||
| 3. | ||||
| 4. | ||||
| 5. | ||||
| 6. | ||||
Different kinds of food items spoil due to different reasons. Some foods spoil soon, some stay good for long. List some seasons and conditions in which food spoils quickly.
Given below are some food items and some simple methods by which these could be kept fresh for 1-2 days. Match the correct pairs:
| Food item | Methods |
| Milk | Put in a bowl and keep the bowl in a container with some water. |
| Cooked rice | Wrap in a damp cloth. |
| Green coriander (Dhania) | Boil it. |
| Onion, garlic | Keep it in a dry open place. |
Why was sugar and jaggery mixed into the mango pulp and dried in the sun?
Glass jars and bottles are dried well in the sun before filling them with pickles. Why is this done? Do you remember what happened to the bread in the experiment?
To eat mangoes round the year we make different items like pickle, aam papad, chutney, chikky, etc. List some other food with which we make different things so that we can enjoy it throughout the year.
Aman’s Biji went to the market to buy bread. The shop was very crowded. The shopkeeper picked up a packet of bread and gave it to Biji. She looked at it and returned it immediately.
How did she find that the bread had got spoilt?
