Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 764 · 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.⚖️ 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 keep it the same (b) we change it (c) we measure it
2. 2.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a balloon (c) turmeric powder (d) a small bottle
4. 4.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
5. 5.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) a mirror (d) a balloon
6. 6.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
7. 7.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
8. 8.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) a magnet (d) salt
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
10. 10.True or false: a comb is needed for the yeast balloon. (a) True (b) False
11. 11.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.⚖️ 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 water (c) size of the balloon (d) the amount of yeast
14. 14.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a tiny living fungus (d) a kind of salt
15. 15.🔮 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
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) dry yeast (d) a mirror
17. 17.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
19. 19.⚖️ 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) False (b) True
20. 20.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
21. 21.True or false: sugar is needed for the yeast balloon. (a) False (b) True
22. 22.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it grows faster (d) it glows
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a balloon (c) warm water (d) sugar
24. 24.🔍 Which is the odd one out? (a) time (b) salt (c) sugar (d) warm water
25. 25.⚖️ 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) size of the balloon (c) the same bottles (d) the water temperature
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) turmeric powder (d) a magnet
27. 27.⚖️ 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 keep it the same (b) we change it (c) we measure it
28. 28.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) time (d) warm water
29. 29.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
30. 30.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
31. 31.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
32. 32.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
34. 34.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
35. 35.🍞 Which of these is something yeast does not need? (a) sugar (b) vinegar (c) warm water (d) time
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) warm water (d) sugar
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a magnet (c) a small bottle (d) a balloon
38. 38.⚖️ 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
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) warm water (d) a paper clip
40. 40.🍞 Which of these is something yeast does not need? (a) sugar (b) sunlight (c) time (d) warm water

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