Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 234 · 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.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of salt (d) a kind of sugar
2. 2.True or false: warm water is something yeast needs. (a) False (b) True
3. 3.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a magnet (c) a comb (d) a paper clip
4. 4.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) a magnet (d) warm water
5. 5.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
6. 6.⚖️ 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 amount of sugar (b) the same bottles (c) the amount of water (d) the water temperature
7. 7.True or false: salt is something yeast does not need. (a) True (b) False
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) warm water (d) a mirror
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) it turns to bread (d) the balloon is bigger
10. 10.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
11. 11.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) a magnet (d) sugar
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a mirror (c) a balloon (d) dry yeast
13. 13.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows much faster (c) it grows very little (d) it turns yellow
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) warm water (d) a magnet
15. 15.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) warm water (d) sugar
16. 16.🛟 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
17. 17.⚖️ 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 water (b) size of the balloon (c) the amount of sugar (d) the water temperature
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) dry yeast (d) turmeric powder
19. 19.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a magnet (c) turmeric powder (d) a comb
20. 20.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a small bottle (c) sugar (d) dry yeast
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a comb (d) a balloon
23. 23.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
24. 24.True or false: warm water is something yeast does not need. (a) True (b) False
25. 25.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
26. 26.True or false: a balloon is needed for the yeast balloon. (a) False (b) True
27. 27.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sugar (d) sunlight
28. 28.⚖️ 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
29. 29.🔍 Which is the odd one out? (a) time (b) vinegar (c) a magnet (d) sunlight
30. 30.⚖️ 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
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a battery cell (d) a small bottle
32. 32.⚖️ 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 keep it the same (b) we measure it (c) we change it
33. 33.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a paper clip (b) sugar (c) a small bottle (d) dry yeast
34. 34.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) warm water (d) a magnet
36. 36.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) warm water (d) vinegar
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) a balloon (d) dry yeast
38. 38.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a balloon (d) a comb
39. 39.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
40. 40.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down

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