Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 579 · 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 amount of water”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) sunlight (d) vinegar
3. 3.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) warm water (d) sugar
4. 4.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
5. 5.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) dry yeast (d) a mirror
6. 6.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) the yeast is killed (c) it grows faster (d) it glows
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a comb (b) dry yeast (c) a small bottle (d) a balloon
8. 8.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
9. 9.⚖️ 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) True (b) False
10. 10.🛟 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
11. 11.True or false: time is something yeast needs. (a) False (b) True
12. 12.⚖️ 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
13. 13.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a battery cell (d) warm water
14. 14.🔍 Which is the odd one out? (a) sugar (b) salt (c) warm water (d) time
15. 15.True or false: sugar is something yeast needs. (a) True (b) False
16. 16.True or false: a paper clip is needed for the yeast balloon. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) time (b) sugar (c) warm water (d) a magnet
18. 18.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) warm water (c) sugar (d) turmeric powder
19. 19.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
20. 20.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
21. 21.True or false: sunlight is something yeast needs. (a) False (b) True
22. 22.⚖️ 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
23. 23.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) a balloon (c) a small bottle (d) a battery cell
24. 24.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.True or false: salt is something yeast needs. (a) True (b) False
26. 26.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it turns yellow (b) it grows very little (c) it grows much faster (d) it bursts at once
27. 27.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) a mirror (d) sugar
28. 28.🧺 Do we need a battery cell for the yeast balloon? (a) needed (b) not needed
29. 29.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
30. 30.📘 What is yeast? (a) a kind of sugar (b) a kind of salt (c) a tiny living fungus (d) a kind of stone
31. 31.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) salt
32. 32.🍞 Where is yeast used in the kitchen? (a) to clean floors (b) to make bread rise (c) to wash dishes (d) to colour rice
33. 33.True or false: salt is something yeast does not need. (a) False (b) True
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a mirror (b) warm water (c) turmeric powder (d) a magnet
36. 36.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
37. 37.⚖️ 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
38. 38.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
39. 39.⚖️ 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 change it (c) we keep it the same
40. 40.🍞 Which of these is something yeast needs? (a) sunlight (b) warm water (c) vinegar (d) salt

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