Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 571 · 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 the one thing we change? (a) the same bottles (b) the water temperature (c) the amount of water (d) the amount of yeast
2. 2.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) warm water (c) turmeric powder (d) a comb
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) dry yeast (d) a comb
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.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
6. 6.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
7. 7.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
8. 8.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.⚖️ 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
10. 10.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) salt (d) sugar
11. 11.⚖️ 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) the amount of yeast (c) size of the balloon
12. 12.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a magnet (c) a mirror (d) a paper clip
16. 16.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
17. 17.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) the balloon is bigger (d) it turns to bread
18. 18.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.True or false: warm water is something yeast does not need. (a) False (b) True
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
21. 21.⚖️ 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) the amount of sugar (c) size of the balloon
22. 22.⚖️ 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 same bottles
23. 23.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time
24. 24.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) turmeric powder (d) a small bottle
25. 25.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) throw it at a wall (d) put it in your mouth
26. 26.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) warm water (d) dry yeast
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
28. 28.True or false: sugar is needed for the yeast balloon. (a) False (b) True
29. 29.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
30. 30.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a mirror (c) turmeric powder (d) a paper clip
31. 31.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
32. 32.🍞 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
33. 33.⚖️ 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 change it (b) we measure it (c) we keep it the same
34. 34.True or false: vinegar is something yeast does not need. (a) False (b) True
35. 35.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.True or false: sugar is something yeast does not need. (a) True (b) False
38. 38.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
39. 39.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sunlight (d) warm water
40. 40.🔍 Which is the odd one out? (a) time (b) a magnet (c) salt (d) sunlight

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