Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 167 · 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.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) a paper clip (d) turmeric powder
2. 2.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
3. 3.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) vinegar
4. 4.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
5. 5.True or false: time is something yeast does not need. (a) True (b) False
6. 6.True or false: warm water is something yeast does not need. (a) True (b) False
7. 7.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) turmeric powder (d) dry yeast
9. 9.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) sugar (d) a paper clip
11. 11.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to wash dishes (c) to clean floors (d) to colour rice
12. 12.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
13. 13.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a paper clip (c) a magnet (d) a battery cell
14. 14.True or false: time is something yeast needs. (a) False (b) True
15. 15.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a tiny living fungus (d) a kind of stone
17. 17.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
18. 18.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) vinegar (d) time
19. 19.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) warm water (d) turmeric powder
21. 21.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
22. 22.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
23. 23.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) sunlight (d) time
24. 24.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
25. 25.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
26. 26.⚖️ 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 change it (b) we keep it the same (c) we measure it
27. 27.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) a magnet (d) sunlight
28. 28.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) salt (d) sunlight
29. 29.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a battery cell (d) a balloon
31. 31.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) warm water (d) sugar
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a comb (d) a battery cell
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
35. 35.⚖️ 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 measure it (b) we keep it the same (c) we change it
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a magnet (c) a small bottle (d) dry yeast
37. 37.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
38. 38.True or false: a comb is needed for the yeast balloon. (a) True (b) False
39. 39.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a small bottle (c) sugar (d) a balloon

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