Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 187 · 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.True or false: sugar is needed for the yeast balloon. (a) False (b) True
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a magnet (d) a balloon
3. 3.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
4. 4.🔍 Which is the odd one out? (a) warm water (b) sugar (c) salt (d) time
5. 5.⚖️ 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 change it (b) we keep it the same (c) we measure it
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a balloon (d) sugar
7. 7.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) pour it down the sink (d) throw it at a wall
8. 8.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) the balloon is smaller (d) it shrinks to nothing
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a mirror (c) a comb (d) a paper clip
11. 11.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.True or false: a comb is not needed for the yeast balloon. (a) False (b) True
14. 14.True or false: warm water is needed for the yeast balloon. (a) True (b) False
15. 15.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
16. 16.⚖️ 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
17. 17.True or false: a magnet is something yeast needs. (a) False (b) True
18. 18.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) warm, not hot (d) boiling hot
19. 19.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) salt (b) vinegar (c) a magnet (d) sugar
21. 21.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
22. 22.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a kind of stone (d) a tiny living fungus
23. 23.⚖️ 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) True (b) False
24. 24.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) a comb (d) sugar
26. 26.🍞 Which of these is something yeast needs? (a) vinegar (b) sunlight (c) a magnet (d) sugar
27. 27.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) sunlight (d) vinegar
28. 28.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it turns to sugar (d) it glows
29. 29.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it grows very little (c) it bursts at once (d) it turns yellow
30. 30.⚖️ 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) True (b) False
31. 31.True or false: sugar is something yeast needs. (a) True (b) False
32. 32.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
33. 33.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
34. 34.🧺 Do we need a mirror for the yeast balloon? (a) not needed (b) needed
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) sugar (c) turmeric powder (d) a paper clip
36. 36.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
37. 37.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
38. 38.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) time (d) warm water
39. 39.⚖️ 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 same bottles (d) the amount of water
40. 40.⚖️ 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 water temperature (c) the amount of yeast

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