Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 268 · 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 vinegar to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
3. 3.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) very salty (d) boiling hot
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.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it shrinks to nothing (d) it turns to bread
6. 6.True or false: salt is something yeast does not need. (a) True (b) False
7. 7.True or false: sugar is something yeast does not need. (a) False (b) True
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) a magnet
9. 9.True or false: sugar is something yeast needs. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) time (d) warm water
11. 11.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a battery cell (c) a small bottle (d) sugar
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a small bottle (c) dry yeast (d) warm water
14. 14.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
15. 15.⚖️ 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 amount of yeast (c) the water temperature
16. 16.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a small bottle (d) a battery cell
17. 17.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) time (b) warm water (c) vinegar (d) sugar
19. 19.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
20. 20.🔮 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
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a small bottle (c) warm water (d) dry yeast
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.⚖️ 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 water temperature (b) the amount of water (c) the amount of yeast (d) size of the balloon
24. 24.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) salt (d) sugar
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a mirror (d) a small bottle
26. 26.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to clean floors (d) to wash dishes
27. 27.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) sugar (d) a battery cell
29. 29.⚖️ 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
30. 30.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) a paper clip (d) dry yeast
32. 32.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) a magnet (d) sugar
33. 33.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
35. 35.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
36. 36.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) False (b) True
38. 38.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) a battery cell (d) dry yeast
39. 39.🔍 Which is the odd one out? (a) salt (b) sugar (c) sunlight (d) a magnet
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) a battery cell (d) a balloon

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