Why are time periods on the geologic time scale not even in length? (1 point)
• They are based on important events that happened in Earth's history.
• They are based on a different type of calendar used to track Earth's history.
O They are based on the thickness of the Earth's rock layers
© They are based on the type of fossils found in rock layers of the Earth
1 answer
• They are based on important events that happened in Earth's history.
1 answer