Scientists can't be sure about the early atmosphere and can only draw evidence from other sources. For example, volcanoes release high quantities of carbon dioxide. Iron-based compounds are present in very old rocks that could only have formed if there was little or no oxygen at the time.
Answer:
Probably because in the south, the farmers needed help with gathering alot of crops, such as cotton. In the north, they didn't have farms, so they didn't need slaves.
Answer:
Composite cone volcano
Explanation:
It is a type of volcano that is fairly symmetrical and has both layers of lava and pyroclastic deposits
The correct answer is - it's mass.
Jupiter is the biggest planet in our Solar System, but only the biggest, also it has the biggest mass by far from all the planets. Because of its very big mass Jupiter has a very strong gravitational pull. The strong gravitational pull contributes to the attraction and keeping of lots of bodies that can not escape it, instead they revolve around the planet. These objects, or space bodies, that the gravitational pull of the planet managed to trap, became the moons, or rather natural satellites, of Jupiter.
