What is the difference between the inner core and the outer core?

Ais a group of individuals of the same that exist together in the same place at the same time

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur