Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 878 · 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.True or false: time is something yeast needs. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) vinegar (b) warm water (c) salt (d) sunlight
3. 3.⚖️ 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
4. 4.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
5. 5.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
6. 6.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
7. 7.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
8. 8.🍞 Which of these is something yeast needs? (a) sugar (b) a magnet (c) salt (d) sunlight
9. 9.🔮 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
10. 10.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) throw it at a wall (d) put it in your mouth
11. 11.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) salt (d) vinegar
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) sugar (d) a balloon
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a paper clip (c) warm water (d) dry yeast
14. 14.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
15. 15.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
16. 16.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
17. 17.⚖️ 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 yeast
18. 18.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of salt (d) a kind of sugar
19. 19.🧺 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) sugar
20. 20.⚖️ 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) True (b) False
21. 21.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
22. 22.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
23. 23.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a paper clip (c) a comb (d) a mirror
24. 24.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a battery cell (c) a small bottle (d) a balloon
26. 26.True or false: warm water is something yeast does not need. (a) False (b) True
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) sugar (c) a balloon (d) dry yeast
28. 28.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) salt
29. 29.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
30. 30.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
32. 32.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
33. 33.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
34. 34.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it heavy (c) to make it sweet (d) it is food for yeast
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of sugar (b) the amount of water (c) the same bottles (d) size of the balloon
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) the amount of water (c) size of the balloon
37. 37.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) a small bottle (d) a battery cell
39. 39.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) sugar (d) dry yeast
40. 40.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed

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