Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 993 · 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? True or false: the amount of water is the one thing we change. (a) False (b) True
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) sugar (c) a comb (d) a mirror
3. 3.True or false: sugar is needed for the yeast balloon. (a) False (b) True
4. 4.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
5. 5.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
6. 6.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it grows much faster (d) it turns yellow
7. 7.True or false: sugar is something yeast needs. (a) True (b) False
8. 8.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) sunlight (d) vinegar
9. 9.⚖️ 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 yeast (b) the amount of water (c) the same bottles (d) size of the balloon
10. 10.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
11. 11.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
12. 12.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a battery cell (d) a mirror
14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) it turns to bread (d) the balloon is bigger
15. 15.🔍 Which is the odd one out? (a) warm water (b) salt (c) sugar (d) time
16. 16.🧺 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 battery cell
17. 17.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) a magnet
20. 20.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) a mirror (d) a magnet
21. 21.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
22. 22.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a mirror (d) a paper clip
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) a magnet (d) a balloon
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) warm water (d) sugar
26. 26.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
27. 27.⚖️ 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
28. 28.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) vinegar (d) a magnet
29. 29.⚖️ 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 water (c) the amount of yeast (d) the water temperature
30. 30.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a mirror (c) warm water (d) turmeric powder
32. 32.True or false: vinegar is something yeast needs. (a) True (b) False
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a mirror (d) warm water
34. 34.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) a magnet (d) time
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a small bottle (c) warm water (d) a balloon
36. 36.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) to colour it (d) it is food for yeast
37. 37.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) turmeric powder (c) a small bottle (d) dry yeast
39. 39.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.⚖️ 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 water temperature (c) the amount of water

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