Question

. Give reasons.

i) Glass can be obtained from sand but sand can not be obtained from glass.

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ii) We should use abiotic substances economically.

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4 Give two examples of irreversible changes in your daily life.

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Answer 1

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).19-Jan-2021

a marine ecosystem, abiotic factors would include salinity and ... Have you ever visited a place that just made you feel hot and

Answer 2

Explanation:

Give two examples of irreversible changes in your daily life