Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 141 · 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? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of yeast
2. 2.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
3. 3.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
4. 4.🍞 Which of these is something yeast does not need? (a) salt (b) warm water (c) time (d) sugar
5. 5.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a magnet (c) dry yeast (d) warm water
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) True (b) False
8. 8.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it bursts at once (d) it grows much faster
9. 9.⚖️ 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
10. 10.🔍 Which is the odd one out? (a) warm water (b) salt (c) time (d) sugar
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a balloon (d) a magnet
12. 12.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
13. 13.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
14. 14.⚖️ 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 amount of sugar (c) the water temperature (d) the same bottles
15. 15.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a battery cell (c) turmeric powder (d) a magnet
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a battery cell (d) a balloon
17. 17.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) salt (d) a magnet
18. 18.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) a magnet
20. 20.⚖️ 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 measure it (c) we change it
21. 21.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a balloon (d) a comb
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a battery cell (d) a paper clip
24. 24.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
25. 25.True or false: sunlight is something yeast does not need. (a) False (b) True
26. 26.🍞 Which of these is something yeast needs? (a) sugar (b) salt (c) vinegar (d) a magnet
27. 27.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
28. 28.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) keep it for a month (d) throw it at a wall
29. 29.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a small bottle (c) a comb (d) a battery cell
31. 31.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) salt (d) vinegar
32. 32.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) warm water (d) time
33. 33.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) vinegar
34. 34.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
35. 35.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
36. 36.True or false: a comb is needed for the yeast balloon. (a) True (b) False
37. 37.⚖️ 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) the water temperature (c) size of the balloon
38. 38.⚖️ 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 sugar (c) the water temperature
39. 39.⚖️ 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
40. 40.🍞 Which of these is something yeast does not need? (a) time (b) vinegar (c) warm water (d) sugar

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