The correct answer is true
D) although recent research (1990's) has shown Uranus and Neptune to be ice giants and have heavier substances.
Photon energy is directly proportional to the frequency of electromagnetic radiation.
(That would also mean that it's inversely proportional to the wavelength.)
So the photon energy increases as you scan the chart of visible colors
moving from the red end of the rainbow to the blue end.
Answer:
D. gravity
Explanation:
Gravity keeps the atmosphere from escaping into space.
Air pressure decreases as altitude increases. this is because air pressure is caused by the gravity of earth, the gravity pulls on the air, compacting it and making a pressure.
But as we go higher, gravity decreases, causing less pull on the air resulting in less air pressure.<span />
