Answer:
The history of Earth covers approximately 4 billion years (4,567,000,000 years), from Earth's formation out of the solar nebula to the present. Earth formed as part of the birth of the solar system: what eventually became the solar system initially existed as a large, rotating cloud of dust and gas.
Explanation:
Answer:
Rock 1 is older than Rock 2, and the mineral grains became smaller over time.
Explanation:
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