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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
- This video is hosted on YouTube
Pros
- Cool graphics engage viewers
- Interesting and informative video
Cons
- None