Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 361 · 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.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
2. 2.🛟 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
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
4. 4.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) dry yeast (c) turmeric powder (d) a battery cell
5. 5.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
9. 9.⚖️ 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 keep it the same (c) we measure it
10. 10.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
11. 11.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) salt (d) warm water
12. 12.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
13. 13.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
14. 14.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a comb (c) a small bottle (d) sugar
16. 16.🔍 Which is the odd one out? (a) sunlight (b) salt (c) vinegar (d) time
17. 17.⚖️ 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
18. 18.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) salt (d) sugar
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) dry yeast (d) a comb
20. 20.⚖️ 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
21. 21.🍞 Which of these is something yeast needs? (a) sunlight (b) vinegar (c) time (d) salt
22. 22.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
23. 23.True or false: sugar is needed for the yeast balloon. (a) False (b) True
24. 24.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) salt (d) sugar
26. 26.True or false: a magnet is something yeast does not need. (a) True (b) False
27. 27.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a comb (c) a battery cell (d) a mirror
29. 29.True or false: warm water is something yeast does not need. (a) False (b) True
30. 30.⚖️ 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 same bottles
31. 31.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) steam (c) smoke (d) carbon dioxide gas
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is the one thing we change. (a) False (b) True
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of water (c) the amount of sugar (d) size of the balloon
34. 34.🍞 Which of these is something yeast does not need? (a) sunlight (b) sugar (c) warm water (d) time
35. 35.True or false: time is something yeast does not need. (a) False (b) True
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
37. 37.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it grows faster (d) it glows
38. 38.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) time (b) warm water (c) a magnet (d) sugar

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