Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 546 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) dry yeast (c) a balloon (d) sugar
2. 2.🔍 Which is the odd one out? (a) sugar (b) time (c) salt (d) warm water
3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
4. 4.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a paper clip (c) a magnet (d) a balloon
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) sugar (d) turmeric powder
6. 6.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
7. 7.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a small bottle (c) a battery cell (d) a mirror
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) sugar (c) a comb (d) turmeric powder
9. 9.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) sugar (d) a magnet
11. 11.⚖️ 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
12. 12.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
13. 13.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
14. 14.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) warm water (d) turmeric powder
16. 16.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
17. 17.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
18. 18.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a comb (c) a balloon (d) sugar
19. 19.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
21. 21.⚖️ 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 measure it (c) we keep it the same
22. 22.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a paper clip (c) a small bottle (d) dry yeast
24. 24.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it turns yellow (d) it grows much faster
26. 26.⚖️ 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
27. 27.True or false: sugar is needed for the yeast balloon. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) sunlight (b) salt (c) time (d) vinegar
29. 29.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it glows (d) it turns to sugar
30. 30.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
31. 31.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) vinegar (d) sugar
32. 32.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
33. 33.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) a magnet
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) True (b) False
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) a balloon (c) warm water (d) a small bottle
36. 36.⚖️ 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
37. 37.True or false: time is something yeast needs. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) sunlight (b) salt (c) sugar (d) a magnet
39. 39.⚖️ 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
40. 40.True or false: a comb is needed for the yeast balloon. (a) True (b) False

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