(50 points)The picture is a cross section of a bone. A cross sectional view of bone. X points to the inner layer. Y points to the middle layer.

Which structures of the bone are indicated by the arrows?

A. X-compact; Y-spongy
B. X-spongy; Y-marrow
C. X-spongy; Y-compact
D. X-marrow; Y-spongy

Your sense of touch depends upon: a. direct contact b. heat chemical c. reactions d. pain

Abeaker of water was heated and then placed on a bench in the laboratory. the water cooled until it was the same temperature as the air in the laboratory. which of these explains the mechanism by which the water cooled? a. heat energy was transferred from the water to the air. b. water molecules from the water formed warm water currents. c. the water molecules absorbed energy from the molecules in the air. d. the water released radiation until it contained no heat energy.

When sodium chloride dissolves in water, the sodium chloride dissociates into a. na- ions. b. cl+ ions. c. nacl ions. d. sodium chloride ions.