Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 482 · 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.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
3. 3.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
4. 4.True or false: warm water is something yeast needs. (a) True (b) False
5. 5.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) steam (d) carbon dioxide gas
6. 6.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it bursts at once (c) it turns yellow (d) it grows much faster
7. 7.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) a magnet (d) sunlight
8. 8.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
10. 10.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.True or false: a magnet is something yeast needs. (a) False (b) True
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) a mirror (d) sugar
14. 14.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) sugar (c) a battery cell (d) a balloon
15. 15.🔍 Which is the odd one out? (a) salt (b) a magnet (c) warm water (d) sunlight
16. 16.True or false: sugar is needed for the yeast balloon. (a) True (b) False
17. 17.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) warm water (c) a balloon (d) sugar
19. 19.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) dry yeast (d) a comb
20. 20.🔍 Which is the odd one out? (a) salt (b) sugar (c) vinegar (d) a magnet
21. 21.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) to colour it (d) it is food for yeast
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) a balloon (d) warm water
23. 23.True or false: time is something yeast does not need. (a) False (b) True
24. 24.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
26. 26.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a small bottle (c) a paper clip (d) sugar
27. 27.True or false: sunlight is something yeast does not need. (a) False (b) True
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a small bottle (c) a magnet (d) dry yeast
29. 29.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) it glows (d) the yeast is killed
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a balloon (d) turmeric powder
31. 31.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
32. 32.True or false: a magnet is something yeast does not need. (a) True (b) False
33. 33.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a comb (c) a paper clip (d) a mirror
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a mirror (d) a balloon
35. 35.True or false: warm water is something yeast does not need. (a) False (b) True
36. 36.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) a magnet (d) salt
37. 37.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) time (d) warm water
38. 38.⚖️ 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) True (b) False
39. 39.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
40. 40.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed

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