Q19 Warm air is heavier or lighter
Q20. Name two Animal fibres.
Q21. Explain how soil is formed.
Q22. Explain why an antacid tablet is taken when you suffer from acidity.
Q23. Factory waste is neutralized before disposing it into the water bodies.
Q24. Why do we often sneeze when we inhale a lot of dust-laden air?
Answers
Answered by
0
Answer:
20. wool and silk ( wool - sheep ) ( silk - silk worms )
21. soil is formed by weathering of rocks and erosion . water , wind , temperature, etc changes the chemical interaction , living organisms and pressure differences help break down of the parent rock
Answered by
0
19 warm air is lighter
20 wool and Silk
21 through weathering
Similar questions