Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 595 · 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.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of salt (d) a kind of stone
2. 2.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows very little (b) it grows much faster (c) it bursts at once (d) it turns yellow
3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) pour it down the sink (c) throw it at a wall (d) keep it for a month
4. 4.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) a comb (d) warm water
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) a small bottle (d) warm water
6. 6.True or false: time is something yeast does not need. (a) False (b) True
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) warm water (c) a comb (d) a small bottle
8. 8.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) turmeric powder (c) a paper clip (d) a battery cell
9. 9.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
12. 12.⚖️ 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
13. 13.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
14. 14.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) smoke (c) carbon dioxide gas (d) steam
15. 15.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
16. 16.True or false: a magnet is needed for the yeast balloon. (a) False (b) True
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) dry yeast (c) turmeric powder (d) a battery cell
18. 18.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) sunlight
19. 19.True or false: warm water is needed for the yeast balloon. (a) True (b) False
20. 20.True or false: warm water is something yeast needs. (a) False (b) True
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
22. 22.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) vinegar (d) salt
23. 23.🔍 Which is the odd one out? (a) sugar (b) salt (c) a magnet (d) sunlight
24. 24.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a paper clip (c) dry yeast (d) a small bottle
25. 25.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a balloon (c) a paper clip (d) a magnet
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) a balloon (d) dry yeast
28. 28.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a mirror (c) sugar (d) a balloon
30. 30.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
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 water (b) the water temperature (c) the amount of yeast (d) the amount of sugar
32. 32.🔍 Which is the odd one out? (a) warm water (b) vinegar (c) time (d) sugar
33. 33.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
34. 34.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) warm water (d) time
35. 35.🍞 Which of these is something yeast needs? (a) a magnet (b) sunlight (c) time (d) salt
36. 36.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) sunlight
37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) size of the balloon (b) the amount of sugar (c) the amount of yeast (d) the same bottles
38. 38.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it turns to bread (c) it shrinks to nothing (d) the balloon is bigger
39. 39.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
40. 40.⚖️ 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

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