Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 466 · 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.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a magnet (d) warm water
2. 2.True or false: warm water is something yeast needs. (a) True (b) False
3. 3.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is bigger (d) the balloon is smaller
5. 5.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
6. 6.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
7. 7.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
8. 8.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) it is food for yeast (d) to colour it
9. 9.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) salt (d) warm water
10. 10.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
11. 11.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
12. 12.🔮 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 glows (d) it grows faster
13. 13.⚖️ 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
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) turmeric powder (c) dry yeast (d) a small bottle
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a mirror (d) a small bottle
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) sugar (d) a magnet
17. 17.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
18. 18.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
19. 19.⚖️ 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
20. 20.⚖️ 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
21. 21.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
22. 22.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of stone (d) a kind of salt
23. 23.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) salt (d) sunlight
24. 24.True or false: sugar is something yeast needs. (a) False (b) True
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) the water temperature (c) the same bottles (d) the amount of yeast
26. 26.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
28. 28.⚖️ 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) True (b) False
29. 29.True or false: warm water is needed for the yeast balloon. (a) False (b) True
30. 30.⚖️ 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 same bottles
31. 31.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) time (d) warm water
32. 32.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
33. 33.⚖️ 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 change it (b) we keep it the same (c) we measure it
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a small bottle (d) a battery cell
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a small bottle (d) a magnet
36. 36.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
37. 37.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) sugar (d) salt
38. 38.⚖️ 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
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) True (b) False
40. 40.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) sugar

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