Science experiments · lesson 8 of 30 · free

Paper helicopter — Science experiments for kids

You need: a strip of paper, safety scissors, a paper clip, a ruler and a pencil. What happens: dropped from your raised hand, the helicopter spins round and floats down slowly. Why: gravity pulls it down, but the air pushes up on the slanted blades (air resistance) and turns them. The paper clip keeps the bottom heavy so it falls upright. More clips make it fall faster; folding the blades the other way makes it spin the other way.

▶ Watch how it works

Got it? Practise ↓

What you do

Air pushes back — “air resistance on the blades slows the fall and spins it”

  1. 1. Draw a T shape on a paper strip and cut it out with safety scissors (an adult helps).
  2. 2. Cut the top down the middle and fold the two blades opposite ways.
  3. 3. Fold up the bottom and clip a paper clip on it.
  4. 4. Drop it from your raised hand and time how long it takes to land.

Use it for: Science lessons on gravity and air resistance; a quick STEM project for kids with paper.

Worked example: 🚁 Why does the paper helicopter fall slowly? → air pushes on its blades

  1. The blades catch the air as it falls.
  2. The air pushes back up on the blades, so it falls slowly.

Check: A crumpled paper ball lands before a flat sheet of the same paper ✓

▶ Watch it animated

✏️ Practice

Work it out in your head or on paper, type the answer and press Check. Stuck? Press “Show me how”.

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🏁 Lesson 8 test

20 questions. Check each answer, then go to the next one. Get 16 or more right to pass.

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🖨️ Paper Helicopter STEM Worksheet

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