Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 671 · 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.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
2. 2.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
3. 3.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
4. 4.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of sugar (d) a kind of salt
5. 5.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a battery cell (d) a magnet
6. 6.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
8. 8.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
9. 9.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) time (d) sugar
10. 10.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
11. 11.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) salt
13. 13.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) a magnet (d) time
14. 14.⚖️ 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
15. 15.True or false: warm water is something yeast needs. (a) False (b) True
16. 16.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) warm water (d) a magnet
18. 18.🔍 Which is the odd one out? (a) time (b) sunlight (c) vinegar (d) a magnet
19. 19.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
20. 20.⚖️ 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) True (b) False
21. 21.🍞 Which of these is something yeast needs? (a) salt (b) warm water (c) vinegar (d) a magnet
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a comb (d) a small bottle
23. 23.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) a small bottle (d) a paper clip
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) sugar (d) a mirror
25. 25.True or false: salt is something yeast needs. (a) False (b) True
26. 26.True or false: sugar is something yeast does not need. (a) False (b) True
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a mirror (d) warm water
28. 28.⚖️ 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 measure it (c) we change it
29. 29.True or false: a magnet is something yeast needs. (a) True (b) False
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a battery cell (c) dry yeast (d) a balloon
31. 31.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) a paper clip (d) warm water
33. 33.🍞 Which of these is something yeast needs? (a) sunlight (b) sugar (c) vinegar (d) salt
34. 34.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
35. 35.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) air from outside (d) steam
36. 36.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed
37. 37.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.⚖️ 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 measure it (b) we change it (c) we keep it the same
39. 39.True or false: warm water is something yeast does not need. (a) False (b) True
40. 40.🛟 The water for the yeast should be ___. (a) warm, not hot (b) boiling hot (c) very salty (d) ice cold

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