Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 162 · 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) salt (b) warm water (c) sugar (d) time
2. 2.🧺 Do we need a battery cell for the yeast balloon? (a) not needed (b) needed
3. 3.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) warm water (c) dry yeast (d) a magnet
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a paper clip (d) a small bottle
5. 5.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
6. 6.🔍 Which is the odd one out? (a) sugar (b) vinegar (c) warm water (d) time
7. 7.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) to make it heavy (d) it is food for yeast
8. 8.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) True (b) False
9. 9.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) warm water (d) a magnet
11. 11.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of sugar (d) a kind of salt
12. 12.True or false: sugar is something yeast does not need. (a) True (b) False
13. 13.⚖️ 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
14. 14.True or false: warm water is something yeast does not need. (a) True (b) False
15. 15.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
16. 16.⚖️ 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 sugar (c) size of the balloon
17. 17.⚖️ 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
18. 18.🎈 What blows up the balloon in the yeast experiment? (a) carbon dioxide gas (b) air from outside (c) steam (d) smoke
19. 19.⚖️ 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 change it (c) we measure it
20. 20.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
21. 21.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) pour it down the sink (d) keep it for a month
22. 22.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
23. 23.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
24. 24.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.True or false: a battery cell is needed for the yeast balloon. (a) False (b) True
26. 26.⚖️ 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 sugar (b) the water temperature (c) the same bottles (d) the amount of water
27. 27.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a magnet (c) warm water (d) dry yeast
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a comb (c) a balloon (d) sugar
30. 30.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
31. 31.True or false: vinegar is something yeast does not need. (a) False (b) True
32. 32.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) ice cold (d) warm, not hot
33. 33.🧺 Which of these is not needed for the yeast balloon? (a) warm water (b) sugar (c) a mirror (d) a small bottle
34. 34.True or false: time is something yeast needs. (a) True (b) False
35. 35.⚖️ 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
36. 36.🔍 Which is the odd one out? (a) a magnet (b) vinegar (c) salt (d) time
37. 37.🔍 Which is the odd one out? (a) salt (b) sunlight (c) warm water (d) vinegar
38. 38.🔍 Which is the odd one out? (a) sunlight (b) salt (c) sugar (d) vinegar
39. 39.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it glows (c) it grows faster (d) it turns to sugar
40. 40.⚖️ 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) size of the balloon (d) the amount of sugar

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