Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 900 · 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? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.True or false: salt is something yeast needs. (a) True (b) False
3. 3.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
4. 4.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a small bottle (d) a battery cell
5. 5.⚖️ 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
6. 6.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
7. 7.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
8. 8.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
9. 9.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a kind of salt (d) a tiny living fungus
11. 11.True or false: warm water is something yeast needs. (a) True (b) False
12. 12.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
13. 13.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) steam (d) smoke
14. 14.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a mirror (c) warm water (d) a balloon
15. 15.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a mirror (c) a battery cell (d) a magnet
16. 16.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
17. 17.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold water is heavy (d) cold kills sugar
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) sugar (c) a small bottle (d) warm water
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
20. 20.True or false: a magnet is something yeast needs. (a) True (b) False
21. 21.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
22. 22.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) sugar (d) vinegar
23. 23.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
24. 24.⚖️ 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 water (b) the amount of sugar (c) size of the balloon (d) the same bottles
25. 25.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) a magnet (d) a mirror
26. 26.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) it is food for yeast (d) to colour it
27. 27.True or false: dry yeast is not needed for the yeast balloon. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) sugar (b) salt (c) sunlight (d) vinegar
29. 29.🔍 Which is the odd one out? (a) time (b) vinegar (c) a magnet (d) salt
30. 30.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of yeast (b) the water temperature (c) size of the balloon
32. 32.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) very salty (d) boiling hot
33. 33.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) a battery cell (d) sugar
36. 36.⚖️ 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
37. 37.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a magnet (c) warm water (d) a small bottle
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.⚖️ 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 measure it (b) we change it (c) we keep it the same
40. 40.True or false: a magnet is something yeast does not need. (a) False (b) True

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