Which two classes of rock will form near or at earth’s surface?
a. extrusive igneous and sedimentary
b. sedimentary and intrusive igneous
c. metamorphic and igneous
d. metamorphic and sedimentary

Aquaternary consumer species would be expected to have a smaller population than a secondary consumer species. select the best answer from the choices provided t f

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. crinoids were most abundant in pennsylvania during the mississippian period, which ranged from 375 to 320 million years ago. fossils of the crinoids shows that during most of this time pennsylvania was that provided favorable conditions for crinoid growth. a) glacial terrain b) a dry and sandy plain c) mostly mountain ranges d) covered by warm, shallow seas