Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 944 · 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 not needed for the yeast balloon? (a) sugar (b) a balloon (c) dry yeast (d) a comb
2. 2.🔍 Which is the odd one out? (a) a magnet (b) salt (c) vinegar (d) time
3. 3.True or false: salt is something yeast needs. (a) True (b) False
4. 4.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
5. 5.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sunlight (d) sugar
6. 6.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
7. 7.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
8. 8.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a kind of sugar (d) a tiny living fungus
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
10. 10.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
11. 11.⚖️ 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) False (b) True
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
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 yeast (b) the same bottles (c) the amount of water (d) the water temperature
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
16. 16.🍞 Which of these is something yeast does not need? (a) warm water (b) salt (c) time (d) sugar
17. 17.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) vinegar (d) a magnet
18. 18.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) dry yeast (d) warm water
21. 21.🍞 Which of these is something yeast does not need? (a) sugar (b) vinegar (c) warm water (d) time
22. 22.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
23. 23.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
24. 24.🍞 Which of these is something yeast does not need? (a) a magnet (b) sugar (c) time (d) warm water
25. 25.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to colour rice (d) to wash dishes
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) warm water (c) turmeric powder (d) a magnet
27. 27.True or false: sugar is needed for the yeast balloon. (a) False (b) True
28. 28.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
29. 29.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a balloon (d) turmeric powder
31. 31.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) salt (d) vinegar
32. 32.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) dry yeast (d) a battery cell
34. 34.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a comb (d) sugar
36. 36.True or false: sunlight is something yeast does not need. (a) True (b) False
37. 37.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a paper clip (c) dry yeast (d) a magnet
38. 38.🔍 Which is the odd one out? (a) time (b) vinegar (c) sugar (d) warm water
39. 39.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
40. 40.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed

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