Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 424 · 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 water is what we measure. (a) False (b) True
2. 2.⚖️ 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 sugar (d) size of the balloon
3. 3.True or false: warm water is something yeast needs. (a) True (b) False
4. 4.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a mirror (d) a balloon
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) True (b) False
7. 7.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
8. 8.⚖️ 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 keep it the same (b) we measure it (c) we change it
9. 9.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) warm water (d) salt
10. 10.⚖️ 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) the amount of water (c) size of the balloon (d) the amount of yeast
11. 11.🔍 Which is the odd one out? (a) sunlight (b) a magnet (c) vinegar (d) time
12. 12.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) sugar (c) a balloon (d) dry yeast
13. 13.⚖️ 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 change it (b) we keep it the same (c) we measure it
14. 14.🧺 Which of these is needed for the yeast balloon? (a) sugar (b) a battery cell (c) a paper clip (d) turmeric powder
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is the one thing we change. (a) True (b) False
16. 16.True or false: warm water is not needed for the yeast balloon. (a) True (b) False
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) warm water (c) turmeric powder (d) sugar
18. 18.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) air from outside (c) smoke (d) carbon dioxide gas
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) size of the balloon (c) the amount of sugar
20. 20.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows much faster (c) it grows very little (d) it bursts at once
21. 21.True or false: warm water is needed for the yeast balloon. (a) True (b) False
22. 22.True or false: vinegar is something yeast does not need. (a) False (b) True
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
24. 24.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
25. 25.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) turmeric powder (c) dry yeast (d) a magnet
27. 27.🍞 Which of these is something yeast needs? (a) vinegar (b) time (c) sunlight (d) a magnet
28. 28.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is kept the same. (a) False (b) True
30. 30.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) throw it at a wall (c) pour it down the sink (d) put it in your mouth
31. 31.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
32. 32.🔍 Which is the odd one out? (a) salt (b) a magnet (c) sugar (d) sunlight
33. 33.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) dry yeast (d) a small bottle
35. 35.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to colour rice (c) to clean floors (d) to make bread rise
36. 36.🍞 Which of these is something yeast needs? (a) vinegar (b) a magnet (c) sunlight (d) warm water
37. 37.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) a small bottle (d) a balloon
39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
40. 40.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it

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