Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 461 · 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.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) dry yeast (c) warm water (d) sugar
3. 3.⚖️ 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 yeast (b) the same bottles (c) size of the balloon (d) the water temperature
4. 4.🔍 Which is the odd one out? (a) salt (b) sunlight (c) vinegar (d) warm water
5. 5.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
6. 6.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.⚖️ 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 change it (b) we keep it the same (c) we measure it
8. 8.⚖️ 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
9. 9.True or false: sunlight is something yeast needs. (a) True (b) False
10. 10.True or false: sugar is needed for the yeast balloon. (a) False (b) True
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) warm water (c) dry yeast (d) a small bottle
12. 12.⚖️ 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 measure it (c) we change it
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a comb (c) dry yeast (d) warm water
14. 14.⚖️ 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
15. 15.⚖️ 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 same bottles (c) the water temperature (d) size of the balloon
16. 16.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
17. 17.True or false: sunlight is something yeast does not need. (a) False (b) True
18. 18.⚖️ 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) True (b) False
19. 19.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
20. 20.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) a comb (d) a mirror
21. 21.🍞 Which of these is something yeast does not need? (a) sunlight (b) warm water (c) time (d) sugar
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a mirror (c) a balloon (d) a small bottle
23. 23.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) vinegar
24. 24.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
25. 25.🍞 Does yeast need vinegar 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 glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
27. 27.True or false: warm water is something yeast needs. (a) True (b) False
28. 28.True or false: salt is something yeast does not need. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) warm water (b) sugar (c) sunlight (d) time
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a battery cell (d) warm water
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) warm water (d) turmeric powder
32. 32.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
33. 33.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) warm water (c) turmeric powder (d) a mirror
35. 35.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to make bread rise (d) to clean floors
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) a paper clip (d) turmeric powder
37. 37.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
39. 39.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) boiling hot (d) warm, not hot
40. 40.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once

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