Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 298 · 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 is the odd one out? (a) vinegar (b) warm water (c) time (d) sugar
2. 2.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
3. 3.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
4. 4.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam
5. 5.⚖️ 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 water temperature (b) size of the balloon (c) the same bottles (d) the amount of yeast
6. 6.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a comb (d) a paper clip
7. 7.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) sugar (d) a magnet
8. 8.True or false: salt is something yeast needs. (a) True (b) False
9. 9.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to wash dishes (c) to make bread rise (d) to clean floors
10. 10.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
11. 11.🛟 The water for the yeast should be ___. (a) warm, not hot (b) ice cold (c) boiling hot (d) very salty
12. 12.⚖️ 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) False (b) True
13. 13.⚖️ 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
14. 14.True or false: a comb is needed for the yeast balloon. (a) True (b) False
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
17. 17.🛟 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
18. 18.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
19. 19.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) turmeric powder (c) a mirror (d) a magnet
20. 20.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) it turns to sugar (d) the yeast is killed
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
22. 22.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) a magnet (d) warm water
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a magnet (d) a small bottle
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) a balloon (d) warm water
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) salt (d) sunlight
27. 27.⚖️ 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
28. 28.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a comb (d) dry yeast
31. 31.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) sunlight (d) time
32. 32.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a tiny living fungus (d) a kind of sugar
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) sugar (c) a small bottle (d) a balloon
34. 34.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold water is heavy (d) cold slows yeast down
35. 35.🔍 Which is the odd one out? (a) salt (b) warm water (c) a magnet (d) vinegar
36. 36.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
37. 37.🍞 Which of these is something yeast does not need? (a) salt (b) sugar (c) warm water (d) time
38. 38.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sugar (d) sunlight
39. 39.🔍 Which is the odd one out? (a) time (b) sugar (c) salt (d) warm water
40. 40.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it shrinks to nothing (c) it turns to bread (d) the balloon is smaller

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