Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 459 · 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.⚖️ 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) size of the balloon (c) the amount of sugar
2. 2.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of salt (d) a kind of stone
3. 3.⚖️ 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 same bottles (c) the water temperature
4. 4.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
5. 5.⚖️ 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
6. 6.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
7. 7.🔮 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
8. 8.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) a magnet (d) time
9. 9.⚖️ 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 water (b) the amount of sugar (c) the same bottles (d) size of the balloon
10. 10.True or false: time is something yeast does not need. (a) False (b) True
11. 11.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) time (d) a magnet
12. 12.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) salt (d) sunlight
13. 13.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
14. 14.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
16. 16.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
17. 17.⚖️ 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
18. 18.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) a magnet (d) dry yeast
20. 20.True or false: a comb is needed for the yeast balloon. (a) True (b) False
21. 21.True or false: sunlight is something yeast needs. (a) False (b) True
22. 22.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
24. 24.⚖️ 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 keep it the same (b) we change it (c) we measure it
25. 25.True or false: sugar is something yeast does not need. (a) True (b) False
26. 26.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
27. 27.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sunlight (d) sugar
28. 28.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) very salty (d) boiling hot
29. 29.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) time (b) warm water (c) salt (d) sugar
31. 31.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows very little (d) it grows much faster
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a mirror (d) a balloon
33. 33.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a battery cell (c) turmeric powder (d) warm water
35. 35.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) smoke (c) carbon dioxide gas (d) air from outside
36. 36.True or false: a magnet is something yeast needs. (a) True (b) False
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
38. 38.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
39. 39.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a paper clip (c) a small bottle (d) sugar

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