Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 210 · 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 something yeast does not need? (a) warm water (b) sugar (c) time (d) sunlight
2. 2.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
3. 3.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) turmeric powder (d) dry yeast
5. 5.True or false: sugar is something yeast does not need. (a) False (b) True
6. 6.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
7. 7.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
8. 8.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
9. 9.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) a magnet (d) sugar
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a small bottle (c) turmeric powder (d) a comb
11. 11.True or false: warm water is something yeast does not need. (a) False (b) True
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the water temperature (c) the amount of sugar (d) the amount of water
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) the same bottles (d) the water temperature
14. 14.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a magnet (c) sugar (d) a small bottle
15. 15.True or false: sunlight is something yeast needs. (a) False (b) True
16. 16.True or false: vinegar is something yeast needs. (a) True (b) False
17. 17.True or false: salt is something yeast does not need. (a) True (b) False
18. 18.True or false: sugar is something yeast needs. (a) False (b) True
19. 19.⚖️ 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 amount of water (c) the water temperature
20. 20.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) salt
21. 21.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) it grows faster (d) the yeast is killed
22. 22.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) a battery cell (d) dry yeast
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a small bottle (d) a mirror
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) a small bottle (d) warm water
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) it turns to bread (d) the balloon is smaller
27. 27.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.🔍 Which is the odd one out? (a) time (b) sunlight (c) salt (d) vinegar
30. 30.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
32. 32.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.🔍 Which is the odd one out? (a) vinegar (b) salt (c) sugar (d) a magnet
34. 34.⚖️ 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 same bottles (c) size of the balloon
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) a battery cell (d) dry yeast
36. 36.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
37. 37.⚖️ 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
38. 38.⚖️ 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 measure it (b) we change it (c) we keep it the same
39. 39.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) sugar (c) a paper clip (d) a magnet

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