PDF chapter test TRY NOW
- Collect the garbage from your house before it is thrown into the dustbin.
- Separate it into two groups, so that they have:
Group 1: Garbage from the kitchen like fruit and vegetable peels, egg shells, waste food, tea leaves. Include newspapers, dry leaves and paper bags in the group A and B,.
Group 2: Pieces of cloth, polythene bags, broken glass, aluminium wrappers, nails, old shoes and broken toys in the group C and D.
- Now divide the contents of each group into two separate heaps.
- Put one heap from Group 1 and one heap from Group 2 into two separate plastic bags.
- Tie the mouth of these two bags tightly.
- Put all the four heaps in separate pits and cover them with soil as shown in figure.
Putting garbage heaps in pits
- You can also use four pots to bury these garbage heaps.
- Remove the soil after four days and observe the changes in the garbage.
- Put the heaps again in the pits and cover with the soil.
- Enter options (i), (ii), (iii) or (iv) based on your observations.
If you make any other observations, do not forget to write all these down in your notebook. Do not remove and burn the garbage that did not rot.
Garbage heap A:
After 4 days -
After 6 days -
After 2 weeks -
After 4 weeks -
Garbage heap B:
After 4 days -
After 6 days -
After 2 weeks -
After 4 weeks -
Garbage heap C:
After 4 days -
After 6 days -
After 2 weeks -
After 4 weeks -
Garbage heap D:
After 4 days -
After 6 days -
After 2 weeks -
After 4 weeks -
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