Question

Long answer type questions
21) Compare fertilizer and Manure.
22) Explain at least any 3 chemical methods of food preservation.
23) (a)What are petrochemicals?
(b) Why we should avoid wearing synthetic clothes while working in kitchen or in a
laboratory?
24) What are consequences of swallowing plastics by animals?
25) Compare physical properties of metals and non metals.

I will mark as brainlist if you give right answer of these quy of class 8th science​

Answer 1

Answer:

21 fertilizer is a non biodegradeable whereas manure is biodegradable

22 Adding salt/honey