Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 774 · 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.🔍 Which is the odd one out? (a) vinegar (b) salt (c) warm water (d) sunlight
2. 2.⚖️ 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
3. 3.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
4. 4.⚖️ 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
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) warm water (c) dry yeast (d) sugar
6. 6.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
7. 7.True or false: a paper clip is not needed for the yeast balloon. (a) True (b) False
8. 8.True or false: sugar is something yeast does not need. (a) False (b) True
9. 9.⚖️ 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 yeast (c) the water temperature
10. 10.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) a small bottle (c) turmeric powder (d) dry yeast
12. 12.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
14. 14.🔍 Which is the odd one out? (a) salt (b) sugar (c) vinegar (d) sunlight
15. 15.True or false: time is something yeast does not need. (a) True (b) False
16. 16.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
17. 17.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
18. 18.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) pour it down the sink (c) put it in your mouth (d) throw it at a wall
19. 19.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) time (d) salt
20. 20.⚖️ 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) False (b) True
21. 21.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it turns to sugar (c) the yeast is killed (d) it grows faster
22. 22.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a mirror (d) a balloon
24. 24.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) warm water (d) a magnet
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
26. 26.⚖️ 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 measure it (b) we change it (c) we keep it the same
27. 27.True or false: a mirror is needed for the yeast balloon. (a) False (b) True
28. 28.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) it turns to bread (d) the balloon is bigger
29. 29.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
30. 30.⚖️ 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
31. 31.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) vinegar
32. 32.⚖️ 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 amount of yeast (d) the amount of sugar
33. 33.📘 What is yeast? (a) a kind of stone (b) a kind of salt (c) a kind of sugar (d) a tiny living fungus
34. 34.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
35. 35.True or false: warm water is something yeast needs. (a) True (b) False
36. 36.⚖️ 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 water temperature (b) the amount of water (c) the amount of yeast (d) the amount of sugar
37. 37.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it bursts at once (d) it grows much faster
38. 38.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it sweet (c) to make it heavy (d) to colour it
39. 39.🔍 Which is the odd one out? (a) sugar (b) a magnet (c) warm water (d) time
40. 40.True or false: warm water is something yeast does not need. (a) True (b) False

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