The main two characteristics that describe any igneous rock are and
a. texture; gas content
b. composition; texture
c. cooling rate; composition
d. composition; gas content

In complete sentences describe the energy flow between the sun, the earth, and space.

The rate at which molecules water and oxygen can enter a cell is determined by the-

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2