How Earth Formed
Earth formed about 4.5 to 4.6 billion years ago. At first, Earth was molten and lacked an atmosphere and oceans. Gradually, the atmosphere formed, followed by the oceans.
CK-12 (High School)
How did the Earth form from dust?
RST.2 - Main Ideas, RST.6 - Author's Purpose
DEPTH OF KNOWLEDGE (DOK) LEVELS:
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