Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 964 · 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 comb for the yeast balloon? (a) needed (b) not needed
2. 2.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
4. 4.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) True (b) False
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) a small bottle (d) a balloon
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.⚖️ 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
9. 9.⚖️ 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
10. 10.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
11. 11.🍞 Does yeast need salt 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 same bottles (b) the amount of yeast (c) size of the balloon (d) the water temperature
13. 13.📘 What is yeast? (a) a tiny living fungus (b) a kind of salt (c) a kind of sugar (d) a kind of stone
14. 14.⚖️ 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
15. 15.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
16. 16.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
17. 17.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) a small bottle (d) sugar
19. 19.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) a magnet
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) turmeric powder (d) warm water
21. 21.⚖️ 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) True (b) False
22. 22.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
24. 24.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
25. 25.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a paper clip (d) a balloon
27. 27.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) warm water (c) sugar (d) dry yeast
29. 29.🔍 Which is the odd one out? (a) warm water (b) sugar (c) a magnet (d) time
30. 30.⚖️ 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
31. 31.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to make it sweet (c) to colour it (d) it is food for yeast
32. 32.True or false: sugar is something yeast does not need. (a) True (b) False
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a paper clip (d) sugar
34. 34.True or false: a magnet is something yeast does not need. (a) True (b) False
35. 35.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once
36. 36.True or false: a comb is needed for the yeast balloon. (a) True (b) False
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 water temperature (b) the amount of yeast (c) the same bottles (d) size of the balloon
38. 38.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) sunlight
39. 39.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
40. 40.True or false: a balloon is needed for the yeast balloon. (a) False (b) True

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