Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 429 · 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 is the odd one out? (a) salt (b) warm water (c) vinegar (d) sunlight
2. 2.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a battery cell (c) sugar (d) dry yeast
3. 3.True or false: salt is something yeast does not need. (a) False (b) True
4. 4.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) keep it for a month (d) put it in your mouth
5. 5.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) False (b) True
7. 7.🔍 Which is the odd one out? (a) sunlight (b) time (c) salt (d) vinegar
8. 8.🔍 Which is the odd one out? (a) salt (b) sugar (c) sunlight (d) a magnet
9. 9.True or false: warm water is something yeast does not need. (a) False (b) True
10. 10.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
11. 11.True or false: a comb is needed for the yeast balloon. (a) False (b) True
12. 12.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) smoke (c) steam (d) air from outside
13. 13.🔍 Which is the odd one out? (a) time (b) warm water (c) a magnet (d) sugar
14. 14.⚖️ 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 amount of yeast
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a comb (c) turmeric powder (d) sugar
16. 16.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a mirror (c) a balloon (d) dry yeast
17. 17.🍞 Which of these is something yeast needs? (a) sunlight (b) salt (c) a magnet (d) warm water
18. 18.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to colour rice (d) to make bread rise
19. 19.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
20. 20.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.⚖️ 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 sugar (b) size of the balloon (c) the water temperature (d) the amount of water
22. 22.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) sugar (c) dry yeast (d) a balloon
23. 23.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
24. 24.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
25. 25.⚖️ 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 measure it (b) we keep it the same (c) we change it
26. 26.⚖️ 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
27. 27.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to colour it (c) to make it sweet (d) to make it heavy
28. 28.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
29. 29.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) it grows faster (d) the yeast is killed
30. 30.🔍 Which is the odd one out? (a) sugar (b) salt (c) warm water (d) time
31. 31.⚖️ 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 amount of water (c) the same bottles (d) the water temperature
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a mirror (c) a battery cell (d) a magnet
33. 33.True or false: a magnet is something yeast needs. (a) True (b) False
34. 34.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
35. 35.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a small bottle (c) turmeric powder (d) a balloon
36. 36.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a kind of stone (d) a tiny living fungus
37. 37.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sunlight (d) sugar
38. 38.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
40. 40.🧺 Which of these is needed for the yeast balloon? (a) warm water (b) a magnet (c) turmeric powder (d) a comb

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