The 2 main gasses which are found in the earth's atmosphere are C. Carbon dioxide and Oxygen.
Fish, Arthropods, Amphibians, and Reptiles all evolved during the Paleozoic Era.
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Answer:
space
Explanation:
As air gets warm, the air molecules have more energy and move around more, taking up more space. As the warm air expands, it becomes less dense than the cold air, so rises up and floats above the cold air.
Answer:
Continental Drift Theory, otherwise known as Wegeners Theory