Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 316 · 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 not needed for the yeast balloon? (a) dry yeast (b) a balloon (c) warm water (d) turmeric powder
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a magnet (d) sugar
3. 3.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
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 (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it glows (d) it turns to sugar
6. 6.🍞 Does yeast need sugar 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) warm water (b) a small bottle (c) sugar (d) a paper clip
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) turmeric powder (d) a small bottle
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) warm water (c) a small bottle (d) dry yeast
10. 10.⚖️ 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 measure it (b) we change it (c) we keep it the same
11. 11.True or false: vinegar is something yeast does not need. (a) True (b) False
12. 12.⚖️ 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
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) sugar (c) a comb (d) a battery cell
14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) it shrinks to nothing (c) the balloon is smaller (d) the balloon is bigger
15. 15.🍞 Which of these is something yeast needs? (a) time (b) salt (c) sunlight (d) a magnet
16. 16.🔮 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
17. 17.True or false: a balloon is needed for the yeast balloon. (a) True (b) False
18. 18.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
19. 19.True or false: sugar is something yeast needs. (a) True (b) False
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
21. 21.⚖️ 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 measure it (c) we keep it the same
22. 22.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
23. 23.⚖️ 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) size of the balloon (c) the amount of yeast (d) the amount of sugar
24. 24.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) sugar (d) a magnet
25. 25.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
27. 27.True or false: sugar is something yeast does not need. (a) True (b) False
28. 28.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
29. 29.True or false: salt is something yeast does not need. (a) False (b) True
30. 30.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a mirror (c) a magnet (d) a paper clip
31. 31.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a balloon (d) a comb
33. 33.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) a magnet (d) vinegar
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a magnet (c) a comb (d) a balloon
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) a balloon (c) a small bottle (d) sugar
36. 36.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
37. 37.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) a magnet (d) warm water
38. 38.🍞 Which of these is something yeast needs? (a) salt (b) vinegar (c) sugar (d) sunlight
39. 39.🔍 Which is the odd one out? (a) warm water (b) time (c) a magnet (d) sugar
40. 40.True or false: warm water is something yeast does not need. (a) True (b) False

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids