Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 970 · 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 not needed for the yeast balloon? (a) warm water (b) sugar (c) turmeric powder (d) a balloon
2. 2.⚖️ 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 amount of water (c) the water temperature (d) the same bottles
3. 3.True or false: warm water is not needed for the yeast balloon. (a) False (b) True
4. 4.🍞 Where is yeast used in the kitchen? (a) to make bread rise (b) to colour rice (c) to clean floors (d) to wash dishes
5. 5.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
6. 6.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) a small bottle (c) warm water (d) sugar
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.🔍 Which is the odd one out? (a) a magnet (b) sunlight (c) sugar (d) salt
9. 9.🔍 Which is the odd one out? (a) warm water (b) salt (c) sunlight (d) a magnet
10. 10.🍞 Which of these is something yeast needs? (a) a magnet (b) salt (c) sugar (d) sunlight
11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) sugar (c) a magnet (d) warm water
12. 12.🍞 Why do we add sugar to the yeast? (a) it is food for yeast (b) to make it heavy (c) to colour it (d) to make it sweet
13. 13.🔍 Which is the odd one out? (a) warm water (b) sugar (c) vinegar (d) time
14. 14.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is bigger (c) it shrinks to nothing (d) the balloon is smaller
15. 15.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.True or false: time is something yeast needs. (a) True (b) False
17. 17.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a comb (c) a paper clip (d) sugar
18. 18.True or false: warm water is needed for the yeast balloon. (a) True (b) False
19. 19.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold slows yeast down (c) cold kills sugar (d) cold water is heavy
20. 20.True or false: warm water is something yeast does not need. (a) False (b) True
21. 21.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
22. 22.True or false: salt is something yeast needs. (a) True (b) False
23. 23.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
24. 24.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of stone (d) a kind of salt
25. 25.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
26. 26.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a comb (c) a balloon (d) a mirror
27. 27.🔍 Which is the odd one out? (a) time (b) salt (c) warm water (d) sugar
28. 28.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) a balloon (c) warm water (d) sugar
29. 29.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a paper clip (c) dry yeast (d) a magnet
30. 30.⚖️ 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
31. 31.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is what we measure. (a) True (b) False
32. 32.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the amount of water (c) the amount of sugar (d) size of the balloon
34. 34.⚖️ 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 keep it the same (b) we measure it (c) we change it
35. 35.🛟 The water for the yeast should be ___. (a) very salty (b) warm, not hot (c) boiling hot (d) ice cold
36. 36.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) a balloon (c) dry yeast (d) sugar
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
38. 38.🔍 Which is the odd one out? (a) sugar (b) sunlight (c) warm water (d) time
39. 39.⚖️ 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
40. 40.True or false: a mirror is not needed for the yeast balloon. (a) True (b) False

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