Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 977 · 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? True or false: size of the balloon is kept the same. (a) False (b) True
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) dry yeast (d) turmeric powder
3. 3.⚖️ 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
4. 4.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
5. 5.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
6. 6.⚖️ 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 keep it the same (b) we change it (c) we measure it
7. 7.⚖️ 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
8. 8.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) dry yeast (c) a small bottle (d) a balloon
9. 9.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
10. 10.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
11. 11.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) a magnet
14. 14.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
15. 15.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
16. 16.⚖️ 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 measure it (b) we keep it the same (c) we change it
17. 17.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
19. 19.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) time (d) warm water
20. 20.⚖️ 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) True (b) False
21. 21.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) turmeric powder (d) a small bottle
22. 22.⚖️ 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) False (b) True
23. 23.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) sugar (d) a magnet
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) dry yeast (d) a balloon
25. 25.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a paper clip (d) a balloon
27. 27.⚖️ 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 measure it (b) we change it (c) we keep it the same
28. 28.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) put it in your mouth (d) keep it for a month
29. 29.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
30. 30.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to clean floors (d) to make bread rise
31. 31.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
32. 32.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
33. 33.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
34. 34.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) warm water
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of water
36. 36.⚖️ 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) False (b) True
37. 37.🔍 Which is the odd one out? (a) time (b) sugar (c) vinegar (d) warm water
38. 38.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
39. 39.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a mirror (c) warm water (d) a small bottle

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