Which statement indicates what the fossil record suggests about evolution on Earth?
Humans have only recently existed on Earth.
O Organisms originally lived only on land.
O Life on Earth started before water formed on Earth.
Multicellular life evolved before complex single-
celled life.

What happens to isotopes that are unstable?

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

28. which is not a reason that water is used to store spent fuel rods from nuclear power plants? water increases the speed of the chain reaction in the fuel rods. water protects nuclear power plant workers from the high temperature and radiation of the fuel rods. water acts as a radiation shield to reduce the radiation levels. water cools the spent rods. salts action