Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 858 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a paper clip (c) sugar (d) a balloon
2. 2.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
3. 3.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) a magnet (d) vinegar
4. 4.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
6. 6.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold kills sugar (d) cold slows yeast down
7. 7.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) salt (d) sugar
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) warm water (d) a magnet
9. 9.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
10. 10.🍞 Which of these is something yeast does not need? (a) salt (b) sugar (c) time (d) warm water
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a paper clip (d) warm water
12. 12.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a small bottle (c) dry yeast (d) a comb
14. 14.True or false: salt is something yeast needs. (a) True (b) False
15. 15.🍞 Which of these is something yeast does not need? (a) warm water (b) sunlight (c) time (d) sugar
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) turmeric powder (d) sugar
17. 17.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
18. 18.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
19. 19.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) vinegar (d) a magnet
20. 20.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
21. 21.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) warm water (d) a magnet
22. 22.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a tiny living fungus (d) a kind of salt
24. 24.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of yeast (c) the same bottles (d) size of the balloon
26. 26.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) sugar (d) time
27. 27.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
28. 28.🔍 Which is the odd one out? (a) sunlight (b) time (c) salt (d) a magnet
29. 29.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
30. 30.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
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 water”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
34. 34.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
35. 35.True or false: time is something yeast needs. (a) True (b) False
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
37. 37.True or false: sugar is something yeast needs. (a) False (b) True
38. 38.⚖️ 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 measure it (b) we change it (c) we keep it the same
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a battery cell (c) dry yeast (d) warm water
40. 40.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True

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