Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 862 · 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) sugar (c) warm water (d) time
2. 2.🛟 The water for the yeast should be ___. (a) boiling hot (b) very salty (c) warm, not hot (d) ice cold
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it bursts at once (c) it grows very little (d) it turns yellow
4. 4.🧺 Do we need dry yeast for the yeast balloon? (a) not needed (b) needed
5. 5.⚖️ 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 sugar (b) the water temperature (c) the amount of yeast (d) size of the balloon
6. 6.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.True or false: a small bottle is not needed for the yeast balloon. (a) True (b) False
8. 8.🍞 Which of these is something yeast does not need? (a) sugar (b) warm water (c) time (d) sunlight
9. 9.⚖️ 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) False (b) True
10. 10.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) warm water (d) a mirror
11. 11.True or false: sugar is not needed for the yeast balloon. (a) True (b) False
12. 12.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
13. 13.🧺 Which of these is needed for the yeast balloon? (a) dry yeast (b) a battery cell (c) turmeric powder (d) a comb
14. 14.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) dry yeast (c) sugar (d) a comb
15. 15.⚖️ 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 same bottles
16. 16.⚖️ 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) True (b) False
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a small bottle (d) a paper clip
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) throw it at a wall (d) put it in your mouth
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a balloon (d) a magnet
20. 20.🍞 Which of these is something yeast does not need? (a) a magnet (b) sugar (c) time (d) warm water
21. 21.⚖️ 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
22. 22.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold water is heavy (c) cold slows yeast down (d) cold kills sugar
23. 23.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) to colour it (d) it is food for yeast
24. 24.True or false: warm water is something yeast does not need. (a) True (b) False
25. 25.⚖️ 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) True (b) False
26. 26.True or false: a magnet is something yeast does not need. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) a magnet (d) time
28. 28.🔍 Which is the odd one out? (a) time (b) warm water (c) vinegar (d) sugar
29. 29.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
32. 32.True or false: sunlight is something yeast does not need. (a) True (b) False
33. 33.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) a small bottle (c) a magnet (d) a battery cell
34. 34.🔍 Which is the odd one out? (a) time (b) warm water (c) a magnet (d) sugar
35. 35.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
36. 36.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
37. 37.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) warm water (d) time
38. 38.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) warm water (c) a small bottle (d) sugar
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
40. 40.📘 What is yeast? (a) a kind of salt (b) a kind of sugar (c) a tiny living fungus (d) a kind of stone

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