Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 566 · 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 does not need? (a) time (b) a magnet (c) sugar (d) warm water
2. 2.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) time (d) sugar
3. 3.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
4. 4.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) keep it for a month (c) put it in your mouth (d) throw it at a wall
6. 6.True or false: salt is something yeast does not need. (a) True (b) False
7. 7.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
8. 8.⚖️ 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
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a battery cell (c) sugar (d) dry yeast
10. 10.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
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 water (b) the same bottles (c) the water temperature (d) size of the balloon
12. 12.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) vinegar
14. 14.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) sunlight
15. 15.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) vinegar (d) sugar
16. 16.🔍 Which is the odd one out? (a) salt (b) sunlight (c) time (d) vinegar
17. 17.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold kills sugar (d) cold water is heavy
18. 18.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
20. 20.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
21. 21.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) a small bottle (d) a paper clip
22. 22.True or false: sugar is something yeast does not need. (a) True (b) False
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) warm water (c) a magnet (d) a paper clip
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) dry yeast (d) a battery cell
25. 25.🧺 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
26. 26.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
27. 27.⚖️ 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
28. 28.⚖️ 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 water temperature (c) the amount of yeast
29. 29.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it turns yellow (c) it bursts at once (d) it grows much faster
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) warm water (d) a paper clip
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) sugar (c) dry yeast (d) warm water
32. 32.⚖️ 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 measure it (b) we keep it the same (c) we change it
33. 33.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
34. 34.⚖️ 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 keep it the same (b) we measure it (c) we change it
35. 35.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
36. 36.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to clean floors (d) to wash dishes
37. 37.True or false: vinegar is something yeast needs. (a) True (b) False
38. 38.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of sugar (c) the same bottles (d) the amount of yeast
40. 40.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it

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