They can occur anywhere between the Earth's surface; about 700 kilometers<span> below the surface.</span>
Explanation:
Well if you think about it...
Venus is to _____. (hot)
So they can't land on it.
Mars is _____. (Not nerarly as hot)
So they can land on it.
So missions to Mars is way safer.
Hope this helps! Sorry if it was not what you were looking for ...
"1. moisture (water vapor) in the air near the surface
2. instability - relatively large decrease of air temperature with height
3. lift - some process (such as a front) that forces air to rise"
The air is dry during the summer and any moisture amount is increased in the afternoon as the temperature cools.
Layer G must be older than layer F, according to the law of superposition. So the answer is Paleozoic era, I believe.