Question

Give reasons. i) Glass can be obtained from sand but sand can not be obtained from glass. ii) We should use abiotic substances economic​

Answer 1

Explanation:

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Answer 2

1. and 2. answer...

1) Believe it or not, glass is made from liquid sand. You can make glass by heating ordinary sand (which is mostly made of silicon dioxide) until it melts and turns into a liquid. You won't find that happening on your local beach: sand melts at the incredibly high temperature of 1700°C (3090°F).

2) Water , sunlight , soil , oxygen , temperature are some of the abiotic factors. We must use them economically because although some of them are abundantly present but some resources like water might get over if not used judiciously.

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