Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 518 · 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: a mirror is needed for the yeast balloon. (a) False (b) True
2. 2.⚖️ 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) True (b) False
3. 3.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
4. 4.⚖️ 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 water (b) the water temperature (c) the amount of sugar (d) the amount of yeast
5. 5.True or false: warm water is needed for the yeast balloon. (a) False (b) True
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) a small bottle (d) a balloon
7. 7.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
8. 8.True or false: a battery cell is needed for the yeast balloon. (a) True (b) False
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a magnet (d) warm water
10. 10.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) sunlight (d) time
11. 11.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold slows yeast down (c) cold makes it pink (d) cold water is heavy
12. 12.🔮 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
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a mirror (d) a battery cell
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a battery cell (c) a mirror (d) turmeric powder
16. 16.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a tiny living fungus (d) a kind of salt
17. 17.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) salt (d) time
18. 18.⚖️ 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 change it (b) we measure it (c) we keep it the same
19. 19.True or false: vinegar is something yeast does not need. (a) True (b) False
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the amount of yeast (d) the amount of sugar
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
23. 23.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
24. 24.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) a magnet (d) salt
25. 25.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) a balloon (c) sugar (d) dry yeast
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) sugar (d) a paper clip
29. 29.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
30. 30.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) vinegar (d) warm water
31. 31.⚖️ 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
32. 32.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
33. 33.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
34. 34.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it sweet (c) to make it heavy (d) to colour it
36. 36.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) air from outside (c) smoke (d) steam
37. 37.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
38. 38.⚖️ 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
39. 39.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
40. 40.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) sunlight (d) time

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