Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 678 · 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? Which of these is what we measure? (a) size of the balloon (b) the amount of sugar (c) the amount of yeast (d) the amount of water
2. 2.True or false: a magnet is something yeast does not need. (a) True (b) False
3. 3.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
5. 5.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
6. 6.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
7. 7.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a balloon (d) a comb
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 turns yellow (d) it bursts at once
10. 10.🔍 Which is the odd one out? (a) time (b) salt (c) warm water (d) sugar
11. 11.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) dry yeast (c) sugar (d) a balloon
13. 13.⚖️ 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
14. 14.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) a magnet (d) sugar
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) a paper clip (d) sugar
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 sugar”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold slows yeast down (d) cold water is heavy
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) a balloon (d) dry yeast
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
20. 20.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
22. 22.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) sugar (d) a small bottle
24. 24.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a battery cell (d) dry yeast
25. 25.True or false: sugar is something yeast does not need. (a) False (b) True
26. 26.True or false: sunlight is something yeast does not need. (a) True (b) False
27. 27.True or false: vinegar is something yeast does not need. (a) False (b) True
28. 28.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
29. 29.True or false: a magnet is something yeast needs. (a) False (b) True
30. 30.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
31. 31.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it glows (d) it grows faster
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a small bottle (c) turmeric powder (d) a mirror
33. 33.True or false: time is something yeast needs. (a) True (b) False
34. 34.⚖️ 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
35. 35.True or false: time is something yeast does not need. (a) False (b) True
36. 36.⚖️ 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 yeast (b) the water temperature (c) the amount of water (d) the amount of sugar
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
38. 38.🍞 Which of these is something yeast does not need? (a) salt (b) sugar (c) warm water (d) time
39. 39.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to wash dishes (d) to make bread rise
40. 40.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) warm water (d) a paper clip

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