Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 593 · 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 sugar to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it bursts at once (d) it grows very little
3. 3.True or false: a magnet is something yeast does not need. (a) False (b) True
4. 4.True or false: warm water is needed for the yeast balloon. (a) False (b) True
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a mirror (c) a balloon (d) sugar
6. 6.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
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 sugar”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.⚖️ 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
9. 9.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) a magnet (d) a paper clip
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) dry yeast (c) a balloon (d) warm water
11. 11.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
12. 12.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) turmeric powder (c) dry yeast (d) warm water
14. 14.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to wash dishes (c) to make bread rise (d) to colour rice
15. 15.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
16. 16.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
17. 17.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
19. 19.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time
20. 20.⚖️ 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 measure it (b) we keep it the same (c) we change it
21. 21.🔍 Which is the odd one out? (a) time (b) sugar (c) a magnet (d) warm water
22. 22.⚖️ 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) size of the balloon (b) the water temperature (c) the amount of sugar (d) the amount of water
23. 23.⚖️ 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
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a small bottle (c) warm water (d) a balloon
25. 25.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
26. 26.⚖️ 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) True (b) False
27. 27.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
28. 28.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) a mirror (d) a magnet
29. 29.🔍 Which is the odd one out? (a) a magnet (b) salt (c) sugar (d) sunlight
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
31. 31.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) salt (d) vinegar
33. 33.🔍 Which is the odd one out? (a) sugar (b) warm water (c) vinegar (d) time
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) warm water (d) a magnet
35. 35.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) pour it down the sink (d) throw it at a wall
36. 36.🔍 Which is the odd one out? (a) salt (b) a magnet (c) time (d) sunlight
37. 37.True or false: vinegar is something yeast needs. (a) True (b) False
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a paper clip (c) dry yeast (d) sugar
39. 39.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) it is food for yeast (d) to make it heavy
40. 40.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of salt (d) a kind of sugar

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