Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 697 · 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 of these is something yeast needs? (a) sugar (b) sunlight (c) salt (d) vinegar
2. 2.True or false: sunlight is something yeast needs. (a) False (b) True
3. 3.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
4. 4.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
5. 5.True or false: time is something yeast does not need. (a) False (b) True
6. 6.True or false: sugar is something yeast needs. (a) False (b) True
7. 7.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
8. 8.True or false: warm water is something yeast needs. (a) False (b) True
9. 9.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
10. 10.True or false: vinegar is something yeast does not need. (a) True (b) False
11. 11.⚖️ 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 amount of water (c) the water temperature (d) the amount of yeast
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) dry yeast (d) a magnet
13. 13.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) vinegar (d) a magnet
14. 14.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy
15. 15.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) sugar (d) a mirror
17. 17.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
18. 18.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) put it in your mouth (d) pour it down the sink
19. 19.True or false: a magnet is something yeast needs. (a) False (b) True
20. 20.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
21. 21.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
22. 22.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) sugar (c) a paper clip (d) a battery cell
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a comb (c) dry yeast (d) a balloon
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) warm water (c) a small bottle (d) a comb
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) size of the balloon (c) the amount of yeast (d) the amount of water
26. 26.True or false: warm water is something yeast does not need. (a) True (b) False
27. 27.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
28. 28.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
31. 31.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
32. 32.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
33. 33.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it sweet (c) to colour it (d) to make it heavy
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) sugar (d) a battery cell
36. 36.📘 What is yeast? (a) a tiny living fungus (b) a kind of stone (c) a kind of sugar (d) a kind of salt
37. 37.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) air from outside (d) carbon dioxide gas
38. 38.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
39. 39.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) a magnet
40. 40.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed

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