A rock will sink in water when it what?

Question

when its....

a) density is greater than air

b_ volume is greater than air

c) density is greater than water

d) volume is les than water

An explanation would be great so Iknow how to do this in the future, Thanks

Answer 1

Density is greater than water (Letter C)  

Density means compactness or closely set and has weight, so if the object is heavier than water and contains no air it will sink or eventually sink.  Physic terms: The rock has more mass/density per unit volume.

Hope this helps.

Answer 2

C.

This applies to all matter, not just rocks.

Answer 3

C:

nothing to do w/ volume

air has no factor