Answer: D
Explanation: I had the same question
Answer:
A. Early signs of life on earth
Explanation:
The Hadean, before the Archean, is the first geologic eon of Earth. It began with the formation of the Earth about 4600 million years ago and ended 4,000 million years ago. The planet had just formed and was still very hot due to high volcanism, a partially molten surface. Some geologists labels the period before the earliest-known rocks on Earth. At the end of it much cooler surface temperature and the formation of solid rock enabled to flaurish the life.
Answer:
Explanation:
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Natural gas is a NONRENEWABLE source of energy. All the other ones are renewable.
-Seth
When blood ph is above normal range, it is a condition called, alkolosis. When blood ph is below the normal range, it is a condition called acidosis.
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