Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 452 · 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.⚖️ 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) True (b) False
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) dry yeast (d) a mirror
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) warm water (c) sugar (d) dry yeast
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
6. 6.🍞 Why do we add sugar to the yeast? (a) to colour it (b) it is food for yeast (c) to make it sweet (d) to make it heavy
7. 7.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
8. 8.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
9. 9.🔍 Which is the odd one out? (a) time (b) sugar (c) a magnet (d) warm water
10. 10.⚖️ 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) size of the balloon (c) the amount of water
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) dry yeast (d) a small bottle
12. 12.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a balloon (d) a paper clip
14. 14.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) vinegar
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) the amount of sugar (b) size of the balloon (c) the water temperature
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) a balloon (d) sugar
17. 17.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
18. 18.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
19. 19.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) False (b) True
21. 21.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
22. 22.True or false: time is something yeast needs. (a) False (b) True
23. 23.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
24. 24.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) a paper clip (b) sugar (c) warm water (d) dry yeast
27. 27.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) salt (d) vinegar
28. 28.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a battery cell (d) a balloon
31. 31.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
32. 32.🔍 Which is the odd one out? (a) a magnet (b) time (c) salt (d) sunlight
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) a small bottle (c) a balloon (d) warm water
34. 34.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
35. 35.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of sugar (d) a kind of salt
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.⚖️ 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
38. 38.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
39. 39.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a paper clip (c) a magnet (d) a mirror
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) a balloon (d) sugar

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