Question

complete the paragraph. compared to the base of a mountain, air pressure at the top of a mountain is and air is dense. so, as air rises to the top of the mountain, it energy and the air temperature tends to be

Explanation:

1. For air pressure at mountain top vs base: Air pressure decreases with altitude (less air above, so lower pressure). So "lower" than at base.
2. For air density at top: With lower pressure, air molecules are more spread out, so density is "less" (or "less" dense).
3. As air rises (to top), it expands (due to lower pressure) and does work, so it "loses" energy (internal energy decreases).
4. Air temperature with lost energy: Lower internal energy means temperature "lower" (adiabatic cooling as air rises).

Answer:

Compared to the base of a mountain, air pressure at the top of a mountain is lower and air is less dense. So, as air rises to the top of the mountain, it loses energy and the air temperature tends to be lower.