6. the source of energy for constructive forces, such as mountain building, is earth's
internal

a gravity

b magnetism

c heat

d pressure

Prior to the mt. st. helens eruption on may 18, 1980, satellite and topographic views of the volcano were captured. based on the topographic map of mt. st. helens, what is the contour interval if the volcano height is 2,950 m? question 9 options: 600 m 400 m 750 m 500 m

In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -

_tissues respond quickly to outside stimuli a) epithelia b)nervous c)muscular d)muscular and nervous