Yeast Balloon Experiment Worksheet

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

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