Answer:
volcanic eruption and solar variation
mark as brainliest
Answer:
Turn off the faucet if you aren’t using it atm,
Not pollute the water with gasoline
Explanation:
These will help preserve earth water supply because then you aren’t wasting the water or making it undrinkable.
No I think you need to do some more research
Explanation:
because at is formed,the lighter part floats on the surface and the really heavy part (like iron and nickel in the core)sank to the middle
