Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 334 · 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.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) pour it down the sink (c) keep it for a month (d) put it in your mouth
2. 2.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) sugar (c) dry yeast (d) warm water
3. 3.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
4. 4.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) very salty (d) boiling hot
5. 5.⚖️ 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 water temperature (c) the same bottles (d) the amount of water
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 the one thing we change. (a) True (b) False
7. 7.⚖️ 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
8. 8.True or false: warm water is something yeast does not need. (a) False (b) True
9. 9.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
10. 10.True or false: time is something yeast does not need. (a) True (b) False
11. 11.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
12. 12.🔍 Which is the odd one out? (a) warm water (b) sugar (c) a magnet (d) time
13. 13.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
14. 14.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
15. 15.⚖️ 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 keep it the same (c) we change it
16. 16.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) warm water (c) a magnet (d) sugar
17. 17.🔍 Which is the odd one out? (a) vinegar (b) sugar (c) salt (d) sunlight
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a balloon (c) warm water (d) a magnet
19. 19.True or false: sugar is something yeast does not need. (a) True (b) False
20. 20.🍞 Which of these is something yeast needs? (a) vinegar (b) warm water (c) a magnet (d) sunlight
21. 21.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of stone (d) a kind of salt
22. 22.⚖️ 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) True (b) False
23. 23.⚖️ 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 same bottles (c) the amount of sugar (d) the water temperature
24. 24.🔍 Which is the odd one out? (a) warm water (b) time (c) sunlight (d) sugar
25. 25.⚖️ 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 measure it (b) we keep it the same (c) we change it
26. 26.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
27. 27.🍞 Which of these is something yeast does not need? (a) time (b) warm water (c) a magnet (d) sugar
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) warm water (c) a balloon (d) a small bottle
29. 29.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) turmeric powder (d) warm water
30. 30.🧺 Do we need warm water for the yeast balloon? (a) not needed (b) needed
31. 31.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
32. 32.🔮 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
33. 33.🍞 Why do we add sugar to the yeast? (a) to make it heavy (b) it is food for yeast (c) to colour it (d) to make it sweet
34. 34.⚖️ 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
35. 35.🍞 Which of these is something yeast does not need? (a) sugar (b) vinegar (c) warm water (d) time
36. 36.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
37. 37.🍞 Which of these is something yeast needs? (a) salt (b) sugar (c) vinegar (d) sunlight
38. 38.🔍 Which is the odd one out? (a) salt (b) a magnet (c) sunlight (d) warm water
39. 39.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to clean floors (c) to make bread rise (d) to wash dishes
40. 40.⚖️ 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

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