Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 33 · 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 needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a mirror (d) dry yeast
2. 2.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) it turns to sugar (d) the yeast is killed
3. 3.⚖️ 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) size of the balloon (c) the water temperature (d) the same bottles
4. 4.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) sunlight (d) vinegar
5. 5.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) sugar (d) salt
6. 6.True or false: sugar is needed for the yeast balloon. (a) False (b) True
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a battery cell (d) sugar
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of water (b) size of the balloon (c) the water temperature
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a balloon (d) turmeric powder
10. 10.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
11. 11.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
12. 12.🔍 Which is the odd one out? (a) salt (b) warm water (c) sugar (d) time
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
14. 14.True or false: warm water is needed for the yeast balloon. (a) False (b) True
15. 15.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a paper clip (c) a magnet (d) a small bottle
16. 16.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) sugar (d) warm water
18. 18.True or false: time is something yeast does not need. (a) True (b) False
19. 19.⚖️ 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) size of the balloon (b) the water temperature (c) the amount of sugar (d) the same bottles
20. 20.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
21. 21.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of salt (d) a kind of sugar
24. 24.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) sugar (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 change it (b) we measure it (c) we keep it the same
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a magnet (d) dry yeast
27. 27.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a magnet (d) a balloon
29. 29.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a small bottle (d) a paper clip
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a comb (c) sugar (d) turmeric powder
32. 32.⚖️ 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
33. 33.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
35. 35.🍞 Which of these is something yeast does not need? (a) salt (b) warm water (c) time (d) sugar
36. 36.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) False (b) True
38. 38.True or false: sunlight is something yeast does not need. (a) True (b) False
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
40. 40.True or false: a magnet is not needed for the yeast balloon. (a) True (b) False

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