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The Wonderful World of Science

Write it down

You measure the height of a bean sprout every day. A sprout is a tiny new plant. Choose which days to write down. Then find one day in your notebook.

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Four days of the same sprout. In the picture, Day 2 is skipped.
Step 1 of 4
  1. Four days of the same sprout. In the picture, Day 2 is skipped.
  2. Day 1 is written down: 5.0 cm.
  3. Days 3 and 4 are written. Day 2 stays empty.
  4. Day 2 is gone. It was never written.

Rule: Write each result down when you get it.

A written number stays the same. A remembered number can change without you knowing.

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This track

  1. 0 Start here
  2. 1 Science is a way of finding out
  3. 2 Ask a question you can check
  4. 3 Say what you expect — before you look
  5. 4 Change one thing at a time
  6. 5 Write it down
  7. 6 One try can fool you
  8. 7 The big picture
  9. 8 Track quiz

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