Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 581 · 40 questions

What you do (Yeast is alive): 1. Pour warm (not hot) water into the bottle — an adult checks it. 2. Add the yeast and the sugar and swirl gently. 3. Stretch the balloon over the bottle’s mouth. 4. Wait 30 minutes, measure the balloon, then pour the mixture away and wash up.

1. 1.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) the balloon is smaller (c) it shrinks to nothing (d) it turns to bread
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the same bottles (c) size of the balloon (d) the amount of sugar
5. 5.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
6. 6.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) vinegar (d) a magnet
10. 10.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a balloon (c) warm water (d) a small bottle
11. 11.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to colour rice (d) to clean floors
12. 12.True or false: a comb is needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a magnet (d) warm water
14. 14.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) turmeric powder (d) a mirror
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) sugar (d) a battery cell
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a balloon (d) dry yeast
17. 17.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
18. 18.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a balloon (c) dry yeast (d) sugar
20. 20.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) vinegar (d) sugar
22. 22.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
23. 23.True or false: warm water is something yeast does not need. (a) True (b) False
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) dry yeast (d) turmeric powder
25. 25.🔍 Which is the odd one out? (a) a magnet (b) salt (c) vinegar (d) time
26. 26.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) a battery cell
28. 28.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) a magnet (d) salt
29. 29.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the same bottles
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) a balloon (d) a comb
32. 32.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of stone (d) a kind of salt
33. 33.True or false: sugar is needed for the yeast balloon. (a) False (b) True
34. 34.🍞 Which of these is something yeast does not need? (a) vinegar (b) time (c) sugar (d) warm water
35. 35.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) vinegar (d) salt
36. 36.True or false: salt is something yeast needs. (a) True (b) False
37. 37.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
38. 38.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it grows faster (d) it glows
39. 39.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True

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