Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 526 · 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.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
2. 2.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) sugar (b) time (c) sunlight (d) warm water
4. 4.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
6. 6.⚖️ 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
7. 7.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
8. 8.True or false: sugar is something yeast does not need. (a) True (b) False
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a balloon (c) sugar (d) a small bottle
10. 10.True or false: a magnet is something yeast does not need. (a) False (b) True
11. 11.🍞 Which of these is something yeast does not need? (a) sunlight (b) warm water (c) sugar (d) time
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) True (b) False
13. 13.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a small bottle (c) a balloon (d) dry yeast
15. 15.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
16. 16.⚖️ 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
17. 17.⚖️ 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 same bottles (b) the amount of water (c) the amount of sugar (d) the water temperature
18. 18.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a mirror (c) a balloon (d) sugar
20. 20.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) steam (c) smoke (d) air from outside
21. 21.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
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) True (b) False
23. 23.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a mirror (d) sugar
25. 25.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) vinegar
26. 26.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a paper clip (c) a magnet (d) a battery cell
27. 27.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it glows (c) the yeast is killed (d) it grows faster
28. 28.🍞 Which of these is something yeast needs? (a) sunlight (b) time (c) vinegar (d) a magnet
29. 29.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) a magnet (d) salt
30. 30.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a tiny living fungus (d) a kind of salt
31. 31.🔮 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
32. 32.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a magnet (d) a small bottle
34. 34.True or false: sugar is something yeast needs. (a) False (b) True
35. 35.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
36. 36.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it turns to bread (d) it shrinks to nothing
37. 37.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a magnet (d) a mirror
38. 38.True or false: time is something yeast does not need. (a) False (b) True
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) dry yeast (c) a small bottle (d) a paper clip
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) sugar (d) a balloon

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