Diamonds are formed when magma containing small amounts of carbon is deeply buried and
a)
is deeply buried and slowly cooled under high pressure
b)
rises near earth's surface and is slowly cooled under low pressure
c)
is deeply buried and quickly cooled under high pressure
d)
is deeply buried and slowly cooled under low pressure

it has one origin of replication, but it proceeds in two directions - d)

the answer is b: 1.4 km/hr

the answer to your question is tooth decay.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.