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2 August, 12:53

Which statements explain what the fossil record indicates? Check all that apply. Earth is 4.5 billion years old. Many organisms have become extinct. Mammals have always existed on Earth. Mass extinctions have occurred several times on Earth. The amount of water on Earth has decreased over time.

ITS 2 AND 4

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  1. 2 August, 15:55
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    Earth is 4.5 billion years old

    Many organisms have become extinct

    Mass extinctions occurred several times on Earth

    The amount of water on Earth has decreased over time

    Explanation:

    The time chart seen in the lesson states that earth was formed 4.5 billion years ago

    The lesson states many organisms have become extinct but that is also common knowledge (mammoths, dodos, dinosaurs, etc)

    The time chart shows that living things were introduced much later after earth was formed. (First single celled life appeared 4.1 billion years ago,.4 billion years AFTER earth was formed.)

    The lesson states mass extinctions occurred several times but this is also common sense.

    The amount of water has decreased on Earth. I'm not sure if this is explicitly stated in the lesson videos but if you think about it, water is being used up by humans every day, and Earth has utilized its water for many things over its 4 billion years of existence. We have obviously lost water.
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