How do marine biomes affect temperature on land? A Currents transport oxygen and cool the air above.
B Currents transport oxygen and warm the air above.
C Currents transport cold and cool the air above.
D Currents transport heat and warm the air above.

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

Ture or false evidence for evolution includes millions of fossils

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.