Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 283 · 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.True or false: a comb is needed for the yeast balloon. (a) True (b) False
3. 3.⚖️ 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
4. 4.⚖️ 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) False (b) True
5. 5.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) warm water (d) a mirror
6. 6.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) dry yeast (d) sugar
8. 8.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
9. 9.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) a balloon (d) a mirror
11. 11.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) sunlight
12. 12.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) warm water (d) a magnet
13. 13.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.True or false: vinegar is something yeast does not need. (a) True (b) False
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) turmeric powder (d) a small bottle
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to clean floors (d) to wash dishes
18. 18.True or false: salt is something yeast needs. (a) False (b) True
19. 19.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) vinegar (d) time
20. 20.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) time (d) sunlight
21. 21.True or false: sugar is something yeast does not need. (a) True (b) False
22. 22.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
23. 23.⚖️ 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) True (b) False
24. 24.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
25. 25.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a kind of sugar (d) a tiny living fungus
26. 26.⚖️ 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
27. 27.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a small bottle (d) a mirror
29. 29.⚖️ 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 water (b) the water temperature (c) size of the balloon (d) the amount of yeast
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a paper clip (d) a small bottle
31. 31.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
32. 32.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) keep it for a month (d) throw it at a wall
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of sugar (c) size of the balloon
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) dry yeast (c) sugar (d) warm water
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) dry yeast (d) a magnet
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) sugar (b) time (c) a magnet (d) warm water
38. 38.🔍 Which is the odd one out? (a) warm water (b) time (c) vinegar (d) sugar
39. 39.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
40. 40.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time

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