Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 748 · 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 “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚖️ 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 amount of yeast (c) size of the balloon (d) the amount of water
3. 3.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
4. 4.🔍 Which is the odd one out? (a) a magnet (b) sugar (c) sunlight (d) vinegar
5. 5.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
6. 6.⚖️ 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 amount of yeast (c) the amount of sugar (d) the water temperature
7. 7.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) warm water (d) sugar
8. 8.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) the yeast is killed (b) it grows faster (c) it turns to sugar (d) it glows
9. 9.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
10. 10.📘 What is yeast? (a) a kind of salt (b) a tiny living fungus (c) a kind of stone (d) a kind of sugar
11. 11.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a mirror (c) a small bottle (d) a magnet
12. 12.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) the balloon is smaller (d) it shrinks to nothing
13. 13.🔍 Which is the odd one out? (a) time (b) salt (c) sugar (d) warm water
14. 14.True or false: a paper clip is not needed for the yeast balloon. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) time (b) a magnet (c) sugar (d) warm water
16. 16.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
17. 17.⚖️ 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 keep it the same (c) we measure it
18. 18.🛟 The water for the yeast should be ___. (a) boiling hot (b) warm, not hot (c) ice cold (d) very salty
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is kept the same. (a) True (b) False
20. 20.True or false: a magnet is needed for the yeast balloon. (a) True (b) False
21. 21.True or false: turmeric powder is needed for the yeast balloon. (a) True (b) False
22. 22.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
24. 24.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
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 keep it the same (b) we measure it (c) we change it
26. 26.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) vinegar (b) time (c) salt (d) a magnet
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) turmeric powder (c) a balloon (d) warm water
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) sugar (c) a balloon (d) a battery cell
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) a paper clip (d) warm water
32. 32.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a paper clip (c) a comb (d) a balloon
33. 33.🍞 Where is yeast used in the kitchen? (a) to colour rice (b) to make bread rise (c) to clean floors (d) to wash dishes
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) dry yeast (c) a small bottle (d) a comb
35. 35.🍞 Which of these is something yeast needs? (a) salt (b) sunlight (c) warm water (d) vinegar
36. 36.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
37. 37.⚖️ 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 water (c) size of the balloon
38. 38.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) turmeric powder (c) sugar (d) a magnet
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
40. 40.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it

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