Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 584 · 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) a magnet (b) warm water (c) time (d) sugar
2. 2.⚖️ 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) True (b) False
3. 3.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
4. 4.⚖️ 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 water (b) the water temperature (c) size of the balloon (d) the amount of yeast
5. 5.⚖️ 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 yeast (b) the water temperature (c) size of the balloon
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) warm water (d) a battery cell
7. 7.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
8. 8.⚖️ 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) True (b) False
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
10. 10.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) a magnet
12. 12.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
13. 13.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
14. 14.True or false: vinegar is something yeast needs. (a) True (b) False
15. 15.🛟 The water for the yeast should be ___. (a) ice cold (b) boiling hot (c) warm, not hot (d) very salty
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a magnet (c) sugar (d) a small bottle
17. 17.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
18. 18.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a mirror (c) warm water (d) dry yeast
21. 21.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) a comb (d) a balloon
22. 22.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
23. 23.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.🍞 Which of these is something yeast does not need? (a) salt (b) time (c) sugar (d) warm water
25. 25.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a small bottle (c) turmeric powder (d) a comb
26. 26.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) salt (d) sugar
28. 28.⚖️ 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
29. 29.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
30. 30.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) throw it at a wall (d) keep it for a month
31. 31.🔍 Which is the odd one out? (a) salt (b) warm water (c) time (d) sugar
32. 32.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) warm water (d) turmeric powder
33. 33.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it bursts at once (c) it grows much faster (d) it grows very little
34. 34.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
35. 35.⚖️ 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) size of the balloon (c) the amount of sugar (d) the amount of yeast
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a paper clip (d) warm water
37. 37.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
38. 38.⚖️ 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
39. 39.🔍 Which is the odd one out? (a) salt (b) vinegar (c) sugar (d) a magnet
40. 40.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to wash dishes (d) to clean floors

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