Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 666 · 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) a battery cell (b) turmeric powder (c) a magnet (d) dry yeast
2. 2.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
3. 3.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
4. 4.⚖️ 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
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) sugar (d) a mirror
6. 6.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) warm water (c) a small bottle (d) dry yeast
8. 8.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
9. 9.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of sugar (d) a kind of salt
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a paper clip (d) a balloon
12. 12.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a balloon (d) a mirror
15. 15.🍞 Which of these is something yeast does not need? (a) a magnet (b) time (c) warm water (d) sugar
16. 16.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
18. 18.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) to colour it (c) to make it sweet (d) it is food for yeast
19. 19.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
20. 20.True or false: a magnet is something yeast needs. (a) True (b) False
21. 21.⚖️ 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
22. 22.🔮 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
23. 23.True or false: salt is something yeast does not need. (a) False (b) True
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) dry yeast (d) turmeric powder
25. 25.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) time (d) sugar
26. 26.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
27. 27.⚖️ 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 same bottles (c) size of the balloon (d) the amount of water
28. 28.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
29. 29.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) the balloon is bigger (d) it turns to bread
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) a comb (d) a small bottle
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a magnet (c) a paper clip (d) warm water
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a mirror (d) sugar
33. 33.True or false: time is something yeast needs. (a) True (b) False
34. 34.True or false: warm water is needed for the yeast balloon. (a) True (b) False
35. 35.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
36. 36.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.⚖️ 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 change it (b) we keep it the same (c) we measure it
38. 38.🍞 Which of these is something yeast needs? (a) sugar (b) sunlight (c) salt (d) vinegar
39. 39.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) salt (d) time
40. 40.True or false: salt is something yeast needs. (a) True (b) False

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