Elements used to make for computers include germanium and :
a. oxygen or b. silicon

What evidence is there that convection occurs in earth’s troposphere?

How does the nervous system affect the excretory system?

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