Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 544 · 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 magnet (b) warm water (c) a small bottle (d) a balloon
2. 2.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
3. 3.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of salt (d) a kind of stone
4. 4.🔍 Which is the odd one out? (a) a magnet (b) salt (c) vinegar (d) warm water
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) the amount of sugar (c) the amount of water (d) size of the balloon
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) a balloon (d) warm water
7. 7.🔍 Which is the odd one out? (a) time (b) sunlight (c) vinegar (d) salt
8. 8.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sugar (d) a magnet
9. 9.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
10. 10.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
11. 11.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is bigger (c) the balloon is smaller (d) it turns to bread
12. 12.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to colour rice (c) to wash dishes (d) to make bread rise
13. 13.⚖️ 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 yeast (b) size of the balloon (c) the water temperature
14. 14.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
15. 15.🔍 Which is the odd one out? (a) sugar (b) time (c) warm water (d) sunlight
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) a small bottle (d) warm water
17. 17.⚖️ 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) True (b) False
18. 18.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) a paper clip (d) sugar
20. 20.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) warm water (d) sunlight
21. 21.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
22. 22.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
23. 23.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) sunlight
24. 24.⚖️ 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) False (b) True
25. 25.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) a small bottle (d) dry yeast
27. 27.True or false: sunlight is something yeast does not need. (a) True (b) False
28. 28.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
29. 29.True or false: sunlight is something yeast needs. (a) True (b) False
30. 30.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) salt
31. 31.⚖️ 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
32. 32.⚖️ 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 water temperature (b) the amount of yeast (c) the same bottles (d) the amount of sugar
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
34. 34.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) a small bottle (d) warm water
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) dry yeast (c) sugar (d) a small bottle
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 water”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a battery cell (c) a paper clip (d) sugar
40. 40.True or false: a comb is not needed for the yeast balloon. (a) False (b) True

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