Balloon Rocket STEM Worksheet
What you do (Push back, move forward): 1. Thread the string through the straw and tie it tightly between two chairs. 2. Blow up the balloon (not too much) and pinch its neck shut. 3. Tape the balloon to the straw, neck pointing backward. 4. Let go, measure how far it goes, and keep it away from faces.
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- 1.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we change it (b) we keep it the same (c) we measure it
- 2.🧺 Do we need vinegar for the balloon rocket? (a) not needed (b) needed
- 3.🧺 Do we need a mirror for the balloon rocket? (a) needed (b) not needed
- 4.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) it stays still (c) backward (d) forward
- 5.True or false: a battery cell is not needed for the balloon rocket. (a) True (b) False
- 6.True or false: water from the oars goes forward. (a) True (b) False
- 7.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) the same string (b) distance it travels (c) how big we blow it
- 8.True or false: a drinking straw is needed for the balloon rocket. (a) True (b) False
- 9.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) vinegar (b) two chairs (c) a drinking straw (d) a balloon
- 10.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes backward (b) goes forward
- 11.🚀 Which of these goes backward? (a) the balloon (b) the swimmer (c) water from the oars (d) the rowing boat
- 12.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is kept the same. (a) True (b) False
- 13.🚀 Which of these goes backward? (a) the swimmer (b) the rocket (c) air from the balloon (d) the rowing boat
- 14.True or false: vinegar is needed for the balloon rocket. (a) True (b) False
- 15.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) the slope of the string (b) distance it travels (c) how big we blow it
- 16.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
- 17.🎈 When does the balloon rocket stop? (a) it never stops (b) when it gets cold (c) when it turns blue (d) when the air runs out
- 18.True or false: air from the balloon goes forward. (a) False (b) True
- 19.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) the slope of the string (c) how big we blow it (d) distance it travels
- 20.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we change it (b) we measure it (c) we keep it the same
- 21.🎈 What is the job of the straw on the string? (a) it guides the balloon (b) it makes it heavier (c) it holds water (d) it blows air in
- 22.🧺 Which of these is needed for the balloon rocket? (a) a battery cell (b) turmeric powder (c) a magnet (d) a long string
- 23.True or false: the swimmer goes forward. (a) False (b) True
- 24.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is the one thing we change. (a) False (b) True
- 25.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same tape (b) distance it travels (c) the slope of the string (d) how big we blow it
- 26.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) yeast (b) a balloon (c) two chairs (d) a drinking straw
- 27.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) put string round a neck (c) aim it at your friend (d) blow it till it bursts
- 28.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a balloon rocket (b) a mirror (c) a sundial (d) a fridge magnet
- 29.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a magnet (b) a long string (c) a balloon (d) a drinking straw
- 30.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a balloon (c) a drinking straw (d) a battery cell
- 31.🚀 Which of these goes forward? (a) water from the oars (b) the swimmer (c) gas from the rocket (d) water a swimmer pushes
- 32.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is kept the same. (a) True (b) False
- 33.True or false: two chairs is needed for the balloon rocket. (a) False (b) True
- 34.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is the one thing we change. (a) False (b) True
- 35.True or false: a magnet is not needed for the balloon rocket. (a) False (b) True
- 36.🚀 In “push back, move forward”, which way does the rocket go? (a) goes forward (b) goes backward
- 37.🧺 Which of these is not needed for the balloon rocket? (a) a balloon (b) yeast (c) sticky tape (d) two chairs
- 38.🚀 In “push back, move forward”, which way does gas from the rocket go? (a) goes forward (b) goes backward
- 39.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) sticky tape (c) a balloon (d) a mirror
- 40.True or false: the balloon goes backward. (a) True (b) False
Answer key
- we change it
- not needed
- not needed
- forward
- True
- False
- the same string
- True
- vinegar
- goes forward
- water from the oars
- True
- air from the balloon
- False
- the slope of the string
- we keep it the same
- when the air runs out
- False
- how big we blow it
- we keep it the same
- it guides the balloon
- a long string
- True
- True
- distance it travels
- yeast
- keep it away from faces
- a balloon rocket
- a magnet
- a battery cell
- the swimmer
- False
- True
- False
- True
- goes forward
- yeast
- goes backward
- a mirror
- False
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