Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 658 · 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 not needed for the yeast balloon? (a) a balloon (b) turmeric powder (c) a small bottle (d) dry yeast
2. 2.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
3. 3.⚖️ 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 amount of yeast (c) the water temperature (d) size of the balloon
4. 4.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) ice cold (d) boiling hot
5. 5.True or false: warm water is something yeast does not need. (a) True (b) False
6. 6.⚖️ 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
7. 7.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it turns yellow (d) it bursts at once
8. 8.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
9. 9.⚖️ 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) size of the balloon (c) the water temperature
10. 10.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) dry yeast (c) a balloon (d) a small bottle
12. 12.⚖️ 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
13. 13.⚖️ 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 change it (b) we keep it the same (c) we measure it
14. 14.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
15. 15.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
16. 16.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) the yeast is killed (d) it glows
17. 17.🍞 Does yeast need sugar to make gas? (a) yeast does not need it (b) yeast needs it
18. 18.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
19. 19.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
20. 20.🔍 Which is the odd one out? (a) warm water (b) sugar (c) time (d) sunlight
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 water temperature (b) the amount of yeast (c) the same bottles (d) size of the balloon
22. 22.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a kind of stone (d) a tiny living fungus
23. 23.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
24. 24.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
25. 25.🍞 Which of these is something yeast needs? (a) time (b) salt (c) a magnet (d) vinegar
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
27. 27.⚖️ 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 water
28. 28.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) warm water (d) salt
29. 29.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam
30. 30.🔍 Which is the odd one out? (a) time (b) a magnet (c) warm water (d) sugar
31. 31.⚖️ 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
32. 32.🔍 Which is the odd one out? (a) warm water (b) sugar (c) salt (d) time
33. 33.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) sunlight (d) salt
34. 34.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
35. 35.🍞 Which of these is something yeast needs? (a) sunlight (b) a magnet (c) salt (d) sugar
36. 36.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
37. 37.True or false: a comb is needed for the yeast balloon. (a) True (b) False
38. 38.True or false: time is something yeast needs. (a) False (b) True
39. 39.True or false: turmeric powder is not needed for the yeast balloon. (a) False (b) True
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a small bottle (c) a balloon (d) warm water

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