Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 63 · 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? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.True or false: salt is something yeast needs. (a) True (b) False
3. 3.⚖️ 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 measure it (b) we keep it the same (c) we change it
4. 4.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) a mirror (d) dry yeast
6. 6.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
7. 7.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
8. 8.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to colour rice (d) to clean floors
9. 9.True or false: warm water is something yeast does not need. (a) True (b) False
10. 10.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
11. 11.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.⚖️ 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 yeast (b) size of the balloon (c) the amount of water (d) the water temperature
13. 13.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) vinegar (d) a magnet
14. 14.🔍 Which is the odd one out? (a) salt (b) a magnet (c) sunlight (d) time
15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
16. 16.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) sugar (d) a mirror
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
20. 20.⚖️ 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 keep it the same (b) we change it (c) we measure it
21. 21.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
22. 22.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
23. 23.True or false: warm water is needed for the yeast balloon. (a) False (b) True
24. 24.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a paper clip (d) a balloon
26. 26.True or false: a magnet is something yeast needs. (a) True (b) False
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a small bottle (d) a magnet
28. 28.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) it turns to bread (d) the balloon is smaller
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) warm water (d) sugar
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a paper clip (c) a balloon (d) warm water
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
32. 32.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) sunlight (d) a magnet
33. 33.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
34. 34.True or false: warm water is something yeast needs. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) warm water (d) time
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a magnet (c) sugar (d) a balloon
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a battery cell (d) a balloon
38. 38.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) warm water (d) time
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) turmeric powder (c) a small bottle (d) sugar
40. 40.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of sugar (d) a kind of stone

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