Weather occurs in this atmospheric thermal layer:

The reformer in a fuel cell system

A. stores energy much like a battery. B. provides oxygen for the energy-releasing chemical reactions. C. extracts hydrogen atoms from a variety of chemical substrates.

The mantle is composed of

A) iron and nickel. B) iron-rich silicate rocks. C) half liquid and half rocky material. D) solid rock.

Our solar system is the center of the universe

a. True

The rapid rate of plate motion was probably the most important factor in rapid continental growth in

the Late Archean. Indicate whether the statement is true or false.