Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 396 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) a small bottle (d) dry yeast
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) a balloon (c) warm water (d) sugar
3. 3.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
4. 4.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) a magnet (d) salt
5. 5.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a comb (c) dry yeast (d) a magnet
6. 6.🔍 Which is the odd one out? (a) time (b) vinegar (c) sugar (d) warm water
7. 7.⚖️ 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 measure it (b) we keep it the same (c) we change it
8. 8.⚖️ 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 change it (b) we keep it the same (c) we measure it
9. 9.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to colour rice (d) to make bread rise
10. 10.🔮 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
11. 11.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
12. 12.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
14. 14.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a balloon (d) a mirror
16. 16.⚖️ 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
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) a balloon (d) warm water
18. 18.⚖️ 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
19. 19.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a mirror (d) a small bottle
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) a balloon (d) sugar
22. 22.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
23. 23.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.True or false: sunlight is something yeast does not need. (a) True (b) False
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) warm water (d) dry yeast
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
27. 27.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
28. 28.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
29. 29.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
30. 30.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) time (d) a magnet
31. 31.⚖️ 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 change it (b) we measure it (c) we keep it the same
32. 32.🔍 Which is the odd one out? (a) warm water (b) time (c) salt (d) sugar
33. 33.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
34. 34.⚖️ 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 measure it (b) we keep it the same (c) we change it
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a small bottle (d) a mirror
36. 36.🔮 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
37. 37.True or false: warm water is something yeast does not need. (a) False (b) True
38. 38.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
39. 39.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) sugar (d) a magnet
40. 40.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True

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