Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 247 · 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.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a balloon (d) a magnet
3. 3.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a battery cell (d) a small bottle
4. 4.⚖️ 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
5. 5.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🔍 Which is the odd one out? (a) vinegar (b) time (c) warm water (d) sugar
7. 7.⚖️ 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 keep it the same (b) we measure it (c) we change it
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
9. 9.🧺 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) warm water
10. 10.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
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 yeast (b) the amount of sugar (c) the water temperature (d) the amount of water
12. 12.🔍 Which is the odd one out? (a) a magnet (b) salt (c) warm water (d) sunlight
13. 13.True or false: warm water is something yeast needs. (a) False (b) True
14. 14.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
15. 15.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
16. 16.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing
17. 17.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
18. 18.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a balloon (c) a battery cell (d) a mirror
19. 19.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
20. 20.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) carbon dioxide gas (d) steam
21. 21.True or false: sugar is something yeast needs. (a) False (b) True
22. 22.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a small bottle (c) a mirror (d) a paper clip
23. 23.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
25. 25.True or false: sugar is something yeast does not need. (a) True (b) False
26. 26.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) turmeric powder (d) dry yeast
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a mirror (c) warm water (d) sugar
29. 29.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to colour rice (d) to make bread rise
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.⚖️ 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
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) warm water (d) a balloon
34. 34.⚖️ 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
35. 35.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
36. 36.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
37. 37.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it grows very little (d) it turns yellow
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the same bottles (c) the amount of sugar (d) the amount of water
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a battery cell (d) warm water
40. 40.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed

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