ACT Science Exam Prep

Category - ACT Science

Approximately how many years ago was the earth formed?
  1. 4.5 billion years ago
  2. 2.5 billion years ago
  3. 4.5 million years ago
  4. 2.5 million years ago
Explanation
Answer: A - It is believed that the Earth was formed 4.5 billion years ago.
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