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.

Concepts

the earth, the earth's history, radioactive dating, scientific discoveries, radioactive decay

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Additional Tags

science

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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
  

• This video is hosted on YouTube

Pros

• Cool graphics engage viewers
• Interesting and informative video
  

Cons

• None