Question

Give reason for following statements :

i) Sound can not be heard on other planets.

ii) Sound needs material medium to propagate.

iii) Evaporation causes cooling.

iv) The snow in the mountain does not melt at once.​

Answer 1

Answer:

i know only two

Explanation:

1. because there is no air on other planet

2. i don't know

3. when water from river's evaporates it forms clouds. clouds become heavy so they condense and fall as rain or snow

4. i dont know