How Do We Know the Age of the Earth?

Some 4.565 billion candles would be needed for a birthday cake for Earth. Young scientists view a video to learn about historical attempts to determine the age of Earth. They see how advances in radioactive dating led to the currently accepted age of 4.565 billion years.

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Instructional Ideas

  • Provide cloze notes for pupils to fill in while watching the video
Classroom Considerations

  • It is advantageous if learners have familiarity with radioactive decay
  • Some basic geology knowledge is beneficial but not necessary
Pros

  • Cool graphics engage viewers
  • Interesting and informative video
Cons

  • None