Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 775 · 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.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) warm water (d) sugar
2. 2.True or false: warm water is needed for the yeast balloon. (a) False (b) True
3. 3.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
4. 4.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to colour rice (d) to wash dishes
5. 5.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
6. 6.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
7. 7.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
8. 8.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) steam (d) air from outside
9. 9.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
10. 10.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time
11. 11.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) time (d) sunlight
12. 12.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a mirror (d) a balloon
14. 14.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) sugar (c) turmeric powder (d) a balloon
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a comb (c) a small bottle (d) dry yeast
17. 17.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it turns to sugar (d) it glows
18. 18.⚖️ 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 keep it the same (c) we change it
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the water temperature (d) the amount of yeast
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) a small bottle (d) turmeric powder
21. 21.True or false: warm water is something yeast does not need. (a) True (b) False
22. 22.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
23. 23.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
24. 24.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
25. 25.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) very salty (d) ice cold
26. 26.🔍 Which is the odd one out? (a) sunlight (b) warm water (c) sugar (d) time
27. 27.⚖️ 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
28. 28.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) warm water (d) a mirror
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) the water temperature (c) size of the balloon
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a magnet (d) sugar
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) time (b) sugar (c) salt (d) warm water
33. 33.⚖️ 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 keep it the same (b) we change it (c) we measure it
34. 34.⚖️ 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) True (b) False
35. 35.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) sunlight (d) time
36. 36.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
37. 37.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a small bottle (d) a battery cell
39. 39.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
40. 40.⚖️ 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 amount of yeast (b) the water temperature (c) the amount of water (d) size of the balloon

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