Imagine the Earth is like a giant birthday cake, and we want to know when it was baked. Scientists use special kinds of clocks in rocks, called radiometric clocks, which work by counting how many times tiny particles have changed over time. These clocks tell us that the Earth is about 4.6 billion years old, like a really long birthday party!
Examples
- A rock acts like a clock, scientists use how much it has changed to know its age.
- It's like counting how many times a birthday cake has been baked.
- Old rocks can tell us about Earth’s early history.
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See also
- How Do Scientists Know What the Inside of Earth Looks Like?
- How Do Scientists Know the Age of the Earth?
- How Did the Earth Get Its Layers?
- What Makes a Mountain 'Active' or 'Dormant'?
- What Causes a Mountain to Form?
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