Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 987 · 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 “size of the balloon”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) time (b) sugar (c) sunlight (d) warm water
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) a balloon (d) warm water
6. 6.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
7. 7.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) sunlight (d) salt
8. 8.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
9. 9.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
10. 10.True or false: vinegar is something yeast does not need. (a) False (b) True
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a mirror (c) dry yeast (d) a balloon
13. 13.⚖️ 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 sugar (b) the amount of yeast (c) size of the balloon (d) the water temperature
14. 14.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
15. 15.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it turns to bread (d) it shrinks to nothing
16. 16.⚖️ 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 sugar (b) size of the balloon (c) the amount of yeast (d) the water temperature
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) warm water (c) a balloon (d) sugar
18. 18.⚖️ 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 change it (c) we measure it
19. 19.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) sugar (d) vinegar
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of yeast (c) size of the balloon
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) dry yeast (d) a small bottle
22. 22.True or false: salt is something yeast does not need. (a) False (b) True
23. 23.True or false: salt is something yeast needs. (a) False (b) True
24. 24.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
25. 25.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.True or false: warm water is something yeast needs. (a) True (b) False
27. 27.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
28. 28.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of water
30. 30.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) it is food for yeast (d) to colour it
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) warm water (d) a paper clip
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a battery cell (c) a mirror (d) a magnet
33. 33.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
34. 34.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a comb (d) sugar
36. 36.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
37. 37.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
38. 38.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
39. 39.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
40. 40.True or false: sugar is something yeast does not need. (a) False (b) True

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