Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 134 · 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 “the amount of sugar”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
4. 4.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
6. 6.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sunlight (d) time
7. 7.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
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 water temperature (b) the amount of water (c) size of the balloon
9. 9.⚖️ 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 water (b) the water temperature (c) the amount of yeast (d) size of the balloon
10. 10.⚖️ 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 yeast
11. 11.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
12. 12.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sugar (d) a magnet
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a balloon (d) turmeric powder
14. 14.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) sunlight (d) salt
15. 15.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) time (d) vinegar
18. 18.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) warm water (c) turmeric powder (d) a magnet
19. 19.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) vinegar (d) a magnet
20. 20.True or false: warm water is something yeast does not need. (a) False (b) True
21. 21.True or false: time is something yeast does not need. (a) False (b) True
22. 22.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
23. 23.True or false: sunlight is something yeast does not need. (a) True (b) False
24. 24.⚖️ 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 yeast
25. 25.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
26. 26.True or false: a magnet is something yeast does not need. (a) False (b) True
27. 27.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) sugar (c) a battery cell (d) a paper clip
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a paper clip (c) a magnet (d) dry yeast
29. 29.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
30. 30.True or false: sugar is needed for the yeast balloon. (a) True (b) False
31. 31.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) a magnet (d) sugar
32. 32.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of salt (d) a kind of stone
33. 33.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) vinegar (d) warm water
34. 34.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) warm water (d) sugar
35. 35.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) warm water (d) a magnet
36. 36.⚖️ 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) True (b) False
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a comb (d) a small bottle
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a paper clip (c) a balloon (d) sugar
40. 40.🔍 Which is the odd one out? (a) warm water (b) time (c) vinegar (d) sugar

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