Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 326 · 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.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
2. 2.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
3. 3.⚖️ 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) False (b) True
4. 4.🍞 Why does yeast work slowly in cold water? (a) cold slows yeast down (b) cold water is heavy (c) cold makes it pink (d) cold kills sugar
5. 5.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.⚖️ 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) True (b) False
7. 7.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a tiny living fungus (d) a kind of sugar
8. 8.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it turns yellow (d) it grows very little
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 sugar (b) the water temperature (c) the same bottles (d) size of the balloon
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a small bottle (d) turmeric powder
11. 11.⚖️ 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) size of the balloon (c) the amount of water (d) the water temperature
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) a balloon (d) sugar
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a small bottle (d) a magnet
14. 14.🔍 Which is the odd one out? (a) salt (b) a magnet (c) vinegar (d) sugar
15. 15.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
16. 16.True or false: sugar is something yeast does not need. (a) False (b) True
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a comb (d) a balloon
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
19. 19.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
20. 20.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
21. 21.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
22. 22.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a paper clip (c) a balloon (d) a battery cell
25. 25.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) sugar (d) time
27. 27.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
28. 28.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.🔍 Which is the odd one out? (a) salt (b) sunlight (c) time (d) a magnet
30. 30.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) sunlight (d) salt
31. 31.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
33. 33.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
35. 35.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) sunlight
36. 36.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) it grows faster (d) the yeast is killed
37. 37.⚖️ 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 keep it the same (b) we measure it (c) we change it
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) sugar (d) a comb
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) a battery cell (d) warm water
40. 40.True or false: sunlight is something yeast needs. (a) True (b) False

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