Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 94 · 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.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
2. 2.🍞 Which of these is something yeast needs? (a) salt (b) a magnet (c) warm water (d) vinegar
3. 3.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
4. 4.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it glows (d) it grows faster
5. 5.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a small bottle (d) turmeric powder
7. 7.🧺 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) sugar
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a mirror (d) a small bottle
9. 9.True or false: a comb is needed for the yeast balloon. (a) False (b) True
10. 10.🧺 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
11. 11.🍞 Which of these is something yeast needs? (a) a magnet (b) time (c) vinegar (d) sunlight
12. 12.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a tiny living fungus (d) a kind of stone
13. 13.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) the balloon is smaller (d) it shrinks to nothing
15. 15.⚖️ 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) size of the balloon (c) the same bottles (d) the amount of water
16. 16.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) dry yeast (c) turmeric powder (d) a battery cell
17. 17.🍞 Which of these is something yeast needs? (a) vinegar (b) salt (c) sugar (d) sunlight
18. 18.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
19. 19.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
20. 20.🔍 Which is the odd one out? (a) warm water (b) time (c) vinegar (d) sugar
21. 21.True or false: warm water is something yeast needs. (a) True (b) False
22. 22.⚖️ 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 water (b) size of the balloon (c) the water temperature
23. 23.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
26. 26.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
27. 27.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
28. 28.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
29. 29.True or false: sugar is something yeast does not need. (a) True (b) False
30. 30.True or false: time is something yeast does not need. (a) True (b) False
31. 31.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
32. 32.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
33. 33.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
34. 34.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
35. 35.🧺 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) sugar
36. 36.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a paper clip (c) dry yeast (d) a balloon
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.🔍 Which is the odd one out? (a) salt (b) time (c) sunlight (d) a magnet
39. 39.🔍 Which is the odd one out? (a) time (b) a magnet (c) sugar (d) warm water
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) a small bottle (d) turmeric powder

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