Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 688 · 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.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
2. 2.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
3. 3.True or false: sugar is something yeast needs. (a) False (b) True
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a balloon (d) a battery cell
5. 5.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is smaller (d) the balloon is bigger
6. 6.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) time (d) warm water
7. 7.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a comb (c) dry yeast (d) sugar
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) dry yeast (d) a paper clip
10. 10.True or false: a magnet is something yeast needs. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar
12. 12.⚖️ 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) True (b) False
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) True (b) False
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
15. 15.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
16. 16.🔍 Which is the odd one out? (a) salt (b) sugar (c) warm water (d) time
17. 17.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) carbon dioxide gas (d) smoke
18. 18.True or false: sunlight is something yeast needs. (a) False (b) True
19. 19.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it glows (d) it grows faster
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) warm water (d) a battery cell
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the amount of water (c) the water temperature (d) the amount of yeast
22. 22.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a paper clip (d) a comb
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) sugar (d) a mirror
24. 24.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) turmeric powder (d) a balloon
25. 25.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) dry yeast (d) a battery cell
26. 26.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
27. 27.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
28. 28.True or false: salt is something yeast needs. (a) False (b) True
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) turmeric powder (c) a balloon (d) dry yeast
30. 30.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
31. 31.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
32. 32.⚖️ 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
33. 33.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) time (b) sunlight (c) salt (d) a magnet
36. 36.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) sunlight
37. 37.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to colour rice (d) to wash dishes
38. 38.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of yeast (c) the water temperature
40. 40.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False

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