Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 164 · 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.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
2. 2.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of sugar (c) the amount of yeast (d) the amount of water
3. 3.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
4. 4.⚖️ 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
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) a magnet (d) a balloon
6. 6.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
7. 7.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
8. 8.True or false: sugar is something yeast does not need. (a) True (b) False
9. 9.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
10. 10.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
12. 12.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
13. 13.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
14. 14.True or false: sunlight is something yeast does not need. (a) True (b) False
15. 15.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
16. 16.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) warm water (d) a paper clip
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
19. 19.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
20. 20.🔍 Which is the odd one out? (a) salt (b) sunlight (c) sugar (d) vinegar
21. 21.True or false: time is something yeast does not need. (a) True (b) False
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a balloon (d) a paper clip
24. 24.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
25. 25.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a paper clip (c) a comb (d) a small bottle
26. 26.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a battery cell (d) a comb
27. 27.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
28. 28.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a small bottle (d) a mirror
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a balloon (d) a battery cell
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
32. 32.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) warm water (d) a magnet
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) the water temperature (c) size of the balloon
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) sugar (d) turmeric powder
35. 35.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to clean floors (d) to make bread rise
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) a mirror (d) dry yeast
37. 37.True or false: a magnet is something yeast does not need. (a) True (b) False
38. 38.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
39. 39.⚖️ 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 water temperature (b) size of the balloon (c) the amount of sugar (d) the amount of yeast
40. 40.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed

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