Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 974 · 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.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
2. 2.⚖️ 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 keep it the same (c) we change it
3. 3.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to clean floors (c) to wash dishes (d) to colour rice
4. 4.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
5. 5.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
6. 6.🔍 Which is the odd one out? (a) sunlight (b) sugar (c) a magnet (d) vinegar
7. 7.⚖️ 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) False (b) True
8. 8.True or false: warm water is something yeast does not need. (a) True (b) False
9. 9.⚖️ 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
10. 10.🔮 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
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
14. 14.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) time (b) warm water (c) sunlight (d) sugar
17. 17.True or false: vinegar is something yeast needs. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) time (b) warm water (c) sugar (d) a magnet
19. 19.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
20. 20.True or false: time is something yeast needs. (a) True (b) False
21. 21.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) put it in your mouth (d) pour it down the sink
22. 22.⚖️ 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 same bottles (d) size of the balloon
23. 23.True or false: salt is something yeast needs. (a) True (b) False
24. 24.True or false: a battery cell is not needed for the yeast balloon. (a) True (b) False
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) a magnet (d) warm water
26. 26.⚖️ 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
27. 27.⚖️ 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 water temperature (b) the amount of sugar (c) the amount of yeast (d) the amount of water
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a battery cell (d) warm water
29. 29.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
30. 30.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) a battery cell (d) a balloon
31. 31.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) a mirror (d) warm water
32. 32.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) sugar (d) a magnet
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) warm water (c) dry yeast (d) turmeric powder
35. 35.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
36. 36.True or false: warm water is something yeast needs. (a) True (b) False
37. 37.🍞 Which of these is something yeast does not need? (a) time (b) a magnet (c) warm water (d) sugar
38. 38.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) salt (d) time
39. 39.True or false: sunlight is something yeast needs. (a) False (b) True
40. 40.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) sugar (c) a comb (d) a small bottle

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