Yeast Balloon Experiment Worksheet

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

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