Using Geographical knowledge to slove it. 1.When we say \" heat rises ,\"it is b

Question

Using Geographical knowledge to slove it.

1.When we say " heat rises,"it is because heat cause fluids (air, water)to expand. This expansion means the same number of molecules occupy a greater space, resulting in lower density.

Please give me an explanation why the answer is lower density? Why lower mass is not correct?

2. Why is ozone vital to life on Earth?( The answer is B)

a.It absorbs longwave radiation from the sun.

b.It absorbs ultraviolet radiation from the sun.

c.It reflects ultraviolet radiation from the sun.

d.It reflects shortwave radiation from the sun.

Please explain why B is correct? And what wrong with answer D?

Explanation / Answer

1) the mass will be same as the number of molecules remain same but the expansion causes the volume to increase

so mass is constant and volume is increased

density = mass / volume

so density is lowered

2) Ozone absorbs ultraviolet radiation and reflects longwave radiation from the sun

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