Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 343 · 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: warm water is not 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? Which of these is the one thing we change? (a) size of the balloon (b) the amount of sugar (c) the water temperature (d) the amount of water
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a mirror (c) dry yeast (d) a small bottle
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) sugar (c) dry yeast (d) a small bottle
5. 5.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) steam (d) smoke
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) sugar (d) a paper clip
7. 7.True or false: a magnet is something yeast does not need. (a) True (b) False
8. 8.⚖️ 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 measure it (b) we keep it the same (c) we change it
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the same bottles (b) size of the balloon (c) the water temperature
10. 10.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to clean floors (d) to wash dishes
11. 11.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone
12. 12.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a comb (d) sugar
15. 15.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
16. 16.🍞 Does yeast need a magnet 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) it shrinks to nothing (b) it turns to bread (c) the balloon is smaller (d) the balloon is bigger
18. 18.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
19. 19.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
20. 20.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a paper clip (c) dry yeast (d) warm water
22. 22.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
23. 23.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) sunlight (d) salt
24. 24.⚖️ 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
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 amount of sugar (b) the amount of yeast (c) size of the balloon (d) the same bottles
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a mirror (d) a balloon
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
28. 28.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) sugar (d) a small bottle
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) dry yeast (d) turmeric powder
31. 31.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) to make it heavy (d) it is food for yeast
32. 32.⚖️ 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 yeast (b) size of the balloon (c) the water temperature
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of water (c) the water temperature
34. 34.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
35. 35.⚖️ 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 change it (b) we keep it the same (c) we measure it
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a comb (d) a magnet
37. 37.🍞 Which of these is something yeast needs? (a) a magnet (b) vinegar (c) sugar (d) salt
38. 38.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
40. 40.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar

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