Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 339 · 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.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
2. 2.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
3. 3.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.🔍 Which is the odd one out? (a) vinegar (b) salt (c) sugar (d) sunlight
5. 5.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a balloon (d) a small bottle
7. 7.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) a comb (d) a mirror
9. 9.🔍 Which is the odd one out? (a) sunlight (b) time (c) salt (d) a magnet
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) a small bottle (d) a balloon
11. 11.True or false: warm water is needed for the yeast balloon. (a) True (b) False
12. 12.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
13. 13.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
14. 14.⚖️ 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 measure it (b) we keep it the same (c) we change it
15. 15.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
16. 16.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) warm water (d) time
17. 17.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
18. 18.⚖️ 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 same bottles (c) the amount of sugar (d) the water temperature
19. 19.True or false: a comb is needed for the yeast balloon. (a) False (b) True
20. 20.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) warm water (d) vinegar
22. 22.⚖️ 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) False (b) True
23. 23.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
24. 24.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) vinegar
25. 25.True or false: vinegar is something yeast needs. (a) True (b) False
26. 26.⚖️ 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 yeast
27. 27.⚖️ 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 keep it the same (b) we measure it (c) we change it
28. 28.True or false: sunlight is something yeast does not need. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) warm water (d) salt
30. 30.🔮 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
31. 31.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
32. 32.⚖️ 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 yeast (c) the amount of sugar (d) the water temperature
33. 33.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
34. 34.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
36. 36.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) a battery cell (d) a balloon
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) turmeric powder (d) a balloon
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a mirror (c) turmeric powder (d) a comb

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