Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 189 · 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 not needed for the yeast balloon? (a) a balloon (b) warm water (c) a small bottle (d) a magnet
2. 2.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
3. 3.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
4. 4.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
5. 5.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) a battery cell (d) a balloon
7. 7.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) dry yeast (d) a mirror
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a small bottle (c) a magnet (d) a battery cell
11. 11.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
12. 12.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
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 kept the same. (a) False (b) True
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) dry yeast (d) turmeric powder
15. 15.⚖️ 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 measure it (c) we change it
16. 16.True or false: salt is something yeast does not need. (a) False (b) True
17. 17.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) salt
18. 18.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) time (d) sugar
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a comb (d) warm water
20. 20.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) the balloon is bigger (d) it shrinks to nothing
21. 21.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
22. 22.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of water (b) the water temperature (c) size of the balloon (d) the amount of yeast
23. 23.⚖️ 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) False (b) True
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) dry yeast (c) sugar (d) a small bottle
25. 25.True or false: a magnet is something yeast does not need. (a) True (b) False
26. 26.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
27. 27.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold water is heavy (d) cold slows yeast down
28. 28.⚖️ 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 water temperature (c) the amount of sugar
29. 29.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) vinegar
30. 30.True or false: warm water is something yeast needs. (a) False (b) True
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) dry yeast (d) a paper clip
32. 32.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
33. 33.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a magnet (d) a mirror
34. 34.⚖️ 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 water (c) the same bottles (d) the water temperature
35. 35.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
37. 37.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
40. 40.True or false: a magnet is something yeast needs. (a) True (b) False

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