Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 484 · 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) ice cold (b) warm, not hot (c) boiling hot (d) very salty
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a paper clip (d) a balloon
3. 3.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) warm water (c) a magnet (d) a small bottle
4. 4.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
5. 5.True or false: salt is something yeast does not need. (a) False (b) True
6. 6.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it turns to sugar (c) it grows faster (d) it glows
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) turmeric powder (d) a balloon
8. 8.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) a small bottle (d) a comb
10. 10.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a magnet (c) turmeric powder (d) a mirror
11. 11.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
12. 12.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.🍞 Which of these is something yeast needs? (a) time (b) a magnet (c) sunlight (d) salt
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a battery cell (c) dry yeast (d) a balloon
15. 15.⚖️ 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
16. 16.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) warm water (d) a paper clip
18. 18.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of salt (d) a kind of stone
20. 20.⚖️ 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 measure it (c) we keep it the same
21. 21.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
22. 22.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
24. 24.True or false: time is something yeast needs. (a) False (b) True
25. 25.True or false: a comb is needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
27. 27.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) turmeric powder (c) a small bottle (d) sugar
28. 28.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) salt (d) a magnet
29. 29.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
30. 30.⚖️ 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 sugar (b) the water temperature (c) the amount of yeast (d) size of the balloon
31. 31.🔍 Which is the odd one out? (a) vinegar (b) sunlight (c) time (d) salt
32. 32.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of yeast”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) time (d) sugar
34. 34.⚖️ 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 amount of water (c) the water temperature
35. 35.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) salt (d) sugar
36. 36.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
38. 38.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
39. 39.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
40. 40.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold makes it pink (c) cold slows yeast down (d) cold water is heavy

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