Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 136 · 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 amount of sugar”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) time (d) sugar
4. 4.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to clean floors (d) to make bread rise
5. 5.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it sweet (d) to make it heavy
6. 6.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) salt (d) vinegar
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) sugar (d) warm water
8. 8.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
10. 10.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
11. 11.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
12. 12.True or false: a small bottle is needed for the yeast balloon. (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 water is the one thing we change. (a) False (b) True
14. 14.⚖️ 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 yeast (d) the same bottles
15. 15.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) sugar (d) a balloon
17. 17.True or false: warm water is something yeast does not need. (a) True (b) False
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) dry yeast (d) warm water
19. 19.⚖️ 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
20. 20.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold slows yeast down (d) cold water is heavy
21. 21.True or false: sunlight is something yeast needs. (a) True (b) False
22. 22.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) sugar (d) salt
23. 23.🧺 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 mirror
24. 24.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
25. 25.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) a mirror (d) a paper clip
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) turmeric powder (d) sugar
27. 27.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
28. 28.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
29. 29.True or false: a comb is needed for the yeast balloon. (a) True (b) False
30. 30.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of stone (d) a kind of salt
31. 31.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) time (b) warm water (c) salt (d) sugar
33. 33.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) a magnet
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a magnet (c) a small bottle (d) sugar
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) turmeric powder (d) a balloon
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) dry yeast (c) a balloon (d) sugar
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of yeast (c) the water temperature (d) size of the balloon
38. 38.⚖️ 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 change it (b) we keep it the same (c) we measure it
39. 39.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
40. 40.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) salt (d) vinegar

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