Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 779 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a small bottle (d) a magnet
2. 2.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a battery cell (c) sugar (d) warm water
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) dry yeast (d) a paper clip
5. 5.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a balloon (d) a comb
7. 7.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
8. 8.True or false: a magnet is something yeast does not need. (a) True (b) False
9. 9.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
10. 10.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.🔍 Which is the odd one out? (a) salt (b) sunlight (c) warm water (d) a magnet
12. 12.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
13. 13.True or false: warm water is needed for the yeast balloon. (a) False (b) True
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) sugar (d) turmeric powder
16. 16.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to wash dishes (d) to clean floors
17. 17.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little
18. 18.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a battery cell (c) a small bottle (d) a mirror
19. 19.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) very salty (d) warm, not hot
20. 20.⚖️ 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 keep it the same (b) we change it (c) we measure it
21. 21.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a paper clip (c) dry yeast (d) a magnet
22. 22.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold slows yeast down (d) cold water is heavy
23. 23.⚖️ 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) the water temperature (c) size of the balloon
24. 24.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) a magnet (d) sunlight
25. 25.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) warm water (c) dry yeast (d) a balloon
26. 26.⚖️ 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
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) turmeric powder (d) sugar
28. 28.⚖️ 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 water temperature (b) the amount of water (c) the same bottles (d) the amount of yeast
29. 29.True or false: a comb is needed for the yeast balloon. (a) True (b) False
30. 30.True or false: sugar is something yeast needs. (a) False (b) True
31. 31.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
32. 32.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
34. 34.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
35. 35.⚖️ 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 water (c) the amount of yeast (d) size of the balloon
36. 36.True or false: salt is something yeast needs. (a) True (b) False
37. 37.True or false: sunlight is something yeast does not need. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) a magnet
39. 39.True or false: vinegar is something yeast does not need. (a) False (b) True
40. 40.⚖️ 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 measure it (c) we keep it the same

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