Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 332 · 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: turmeric powder is not needed for the yeast balloon. (a) True (b) False
2. 2.🍞 Which of these is something yeast needs? (a) a magnet (b) warm water (c) salt (d) sunlight
3. 3.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
4. 4.True or false: dry yeast is needed for the yeast balloon. (a) True (b) False
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 water”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.True or false: time is something yeast does not need. (a) True (b) False
7. 7.⚖️ 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
8. 8.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) air from outside (c) smoke (d) steam
9. 9.True or false: a small bottle is not needed for the yeast balloon. (a) False (b) True
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) the water temperature (b) size of the balloon (c) the same bottles
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) dry yeast (d) warm water
12. 12.🔍 Which is the odd one out? (a) sunlight (b) time (c) a magnet (d) salt
13. 13.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) a magnet
14. 14.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) keep it for a month (d) pour it down the sink
15. 15.📘 What is yeast? (a) a kind of salt (b) a kind of stone (c) a tiny living fungus (d) a kind of sugar
16. 16.⚖️ 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 yeast (b) the water temperature (c) the amount of water (d) size of the balloon
17. 17.🍞 Which of these is something yeast needs? (a) salt (b) time (c) a magnet (d) vinegar
18. 18.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
19. 19.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) sugar (b) time (c) a magnet (d) warm water
21. 21.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) sugar (c) a paper clip (d) a mirror
22. 22.True or false: warm water is needed for the yeast balloon. (a) True (b) False
23. 23.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
24. 24.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
25. 25.🔍 Which is the odd one out? (a) vinegar (b) a magnet (c) salt (d) sugar
26. 26.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) sunlight
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) warm water (d) a paper clip
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) turmeric powder (c) dry yeast (d) a balloon
30. 30.🔍 Which is the odd one out? (a) sugar (b) salt (c) time (d) warm water
31. 31.🔮 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 grows faster (d) it glows
32. 32.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
33. 33.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
34. 34.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
35. 35.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) the balloon is bigger (c) it shrinks to nothing (d) it turns to bread
36. 36.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is what we measure. (a) False (b) True
37. 37.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.⚖️ 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) False (b) True
39. 39.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
40. 40.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it turns yellow (d) it grows very little

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