Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 145 · 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.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
2. 2.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
3. 3.⚖️ 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 water (b) the water temperature (c) size of the balloon
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) a comb (d) dry yeast
5. 5.True or false: salt is something yeast needs. (a) False (b) True
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a balloon (c) turmeric powder (d) a mirror
7. 7.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a kind of sugar (d) a tiny living fungus
8. 8.⚖️ 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
9. 9.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) sugar (c) warm water (d) dry yeast
11. 11.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.⚖️ 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 amount of sugar (c) the water temperature (d) the amount of yeast
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a mirror (d) dry yeast
14. 14.⚖️ 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
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) dry yeast (c) a balloon (d) sugar
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a battery cell (d) a balloon
17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
18. 18.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a magnet (d) a small bottle
20. 20.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) a balloon (d) sugar
21. 21.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) time
23. 23.⚖️ 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 amount of sugar (c) the same bottles (d) the amount of water
24. 24.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
25. 25.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) sunlight
26. 26.🔍 Which is the odd one out? (a) time (b) a magnet (c) salt (d) sunlight
27. 27.True or false: a comb is needed for the yeast balloon. (a) False (b) True
28. 28.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
29. 29.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) salt (d) sugar
30. 30.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a small bottle (d) a magnet
32. 32.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
33. 33.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) False (b) True
35. 35.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) vinegar (d) sugar
37. 37.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) True (b) False
39. 39.⚖️ 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) False (b) True
40. 40.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink

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