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Activity 13.2 — Decomposition by Microorganisms
NCERT Activity 13.2: Compare decomposition of biodegradable waste (banana peels, vegetable scraps) with non-biodegradable waste (plastic, metal) over time.
How To Perform
1
Place Biodegradable Waste
Add banana peels and vegetable scraps to Container A.
2
Place Non-biodegradable Waste
Add plastic bag and metal can to Container B.
3
Observe After 1 Week
Check for early signs of decomposition.
4
Observe After 2 Weeks
Notice mold, fungi, and visible breakdown.
5
Observe After 4 Weeks
Compare final states — compost vs unchanged waste.
6
Check Understanding
Why do some materials decompose and others don't?