Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 978 · 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.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) a battery cell (d) warm water
3. 3.True or false: a comb is needed for the yeast balloon. (a) True (b) False
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) turmeric powder (d) sugar
5. 5.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
6. 6.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) sunlight
7. 7.🍞 Which of these is something yeast needs? (a) time (b) salt (c) a magnet (d) sunlight
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) a magnet
9. 9.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold kills sugar (d) cold makes it pink
10. 10.⚖️ 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) False (b) True
11. 11.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
13. 13.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
15. 15.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
16. 16.🔍 Which is the odd one out? (a) sugar (b) warm water (c) vinegar (d) time
17. 17.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
19. 19.🍞 Which of these is something yeast needs? (a) sugar (b) salt (c) a magnet (d) sunlight
20. 20.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
21. 21.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) a balloon (d) a magnet
22. 22.True or false: a magnet is something yeast needs. (a) False (b) True
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a small bottle (d) a battery cell
24. 24.⚖️ 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) the amount of sugar (c) the amount of water (d) the water temperature
25. 25.True or false: salt is something yeast needs. (a) False (b) True
26. 26.True or false: sunlight is something yeast does not need. (a) False (b) True
27. 27.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.⚖️ 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
29. 29.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
30. 30.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) time (d) sugar
31. 31.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.True or false: warm water is needed for the yeast balloon. (a) False (b) True
33. 33.🛟 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
34. 34.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
35. 35.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) dry yeast (d) turmeric powder
37. 37.True or false: sunlight is something yeast needs. (a) False (b) True
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a magnet (c) dry yeast (d) a small bottle
39. 39.True or false: a magnet is something yeast does not need. (a) False (b) True
40. 40.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed

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