Your heart functions in your body as a(n)
a. series of joints responsible for endurance.
b. organ for absorbing vitamins and minerals.
c. filter for impurities.
d. muscle that to pump oxygen around the body.

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