Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 279 · 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.⚖️ 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) False (b) True
2. 2.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) sunlight
3. 3.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
5. 5.🛟 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
6. 6.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of sugar (d) a kind of salt
7. 7.⚖️ 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 water (c) the amount of sugar (d) the amount of yeast
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) False (b) True
9. 9.🛟 The water for the yeast should be ___. (a) ice cold (b) very salty (c) boiling hot (d) warm, not hot
10. 10.⚖️ 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 yeast (b) the amount of sugar (c) the water temperature (d) the same bottles
11. 11.⚖️ 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) False (b) True
12. 12.True or false: sugar is not needed for the yeast balloon. (a) False (b) True
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) turmeric powder (d) sugar
14. 14.⚖️ 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 measure it (b) we change it (c) we keep it the same
15. 15.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) sunlight (d) salt
16. 16.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) a comb (d) turmeric powder
17. 17.⚖️ 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
18. 18.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it glows (d) it turns to sugar
19. 19.⚖️ 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) the amount of yeast (c) size of the balloon
20. 20.🔍 Which is the odd one out? (a) warm water (b) salt (c) time (d) sugar
21. 21.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
22. 22.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
23. 23.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
24. 24.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a mirror (c) a small bottle (d) a comb
25. 25.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a paper clip (c) sugar (d) dry yeast
26. 26.True or false: salt is something yeast does not need. (a) False (b) True
27. 27.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a magnet (d) a balloon
28. 28.True or false: vinegar is something yeast needs. (a) True (b) False
29. 29.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold slows yeast down (c) cold makes it pink (d) cold kills sugar
30. 30.True or false: salt is something yeast needs. (a) True (b) False
31. 31.True or false: a magnet is something yeast needs. (a) True (b) False
32. 32.True or false: warm water is something yeast needs. (a) True (b) False
33. 33.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
34. 34.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) a balloon (c) a small bottle (d) a mirror
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a battery cell (c) sugar (d) warm water
36. 36.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) warm water (d) a magnet
37. 37.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
38. 38.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is the one thing we change. (a) False (b) True
40. 40.⚖️ 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

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