The tectonic cycle describes the movement of earth's crust. recycled "new" oceanic crust is formed by at divergent boundaries.
a. convergence
b. seafloor spreading
c. subduction
d. weathering

Which best explains how a heat pump can heat a room? cold air from the house is moved through pipes, where it absorbs thermal energy. warm air from outside is pushed into the house to replace the cold air. combustion warms the air when chemical energy is transferred to thermal energy. fuel is used to move a piston, which pushes warm air into the house.

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

Which label correctly identifies what x represents in the concept map?