Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 648 · 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.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) dry yeast (c) sugar (d) a mirror
2. 2.🧺 Do we need turmeric powder for the yeast balloon? (a) not needed (b) needed
3. 3.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) the yeast is killed (c) it glows (d) it turns to sugar
4. 4.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.⚖️ 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
6. 6.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a balloon (b) a mirror (c) a magnet (d) a battery cell
8. 8.🛟 The water for the yeast should be ___. (a) ice cold (b) warm, not hot (c) boiling hot (d) very salty
9. 9.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
10. 10.⚖️ 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 yeast (b) the amount of sugar (c) the water temperature (d) size of the balloon
11. 11.⚖️ 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
12. 12.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a balloon (c) a battery cell (d) sugar
14. 14.True or false: sugar is something yeast needs. (a) False (b) True
15. 15.🍞 Does yeast need warm water to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.True or false: vinegar is something yeast does not need. (a) False (b) True
17. 17.True or false: sugar is needed for the yeast balloon. (a) True (b) False
18. 18.🔮 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
19. 19.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) a magnet (d) time
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a paper clip (c) dry yeast (d) a magnet
21. 21.🍞 Which of these is something yeast needs? (a) time (b) salt (c) sunlight (d) a magnet
22. 22.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.True or false: salt is something yeast needs. (a) False (b) True
24. 24.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) a magnet (d) salt
25. 25.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
26. 26.True or false: sunlight is something yeast needs. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a magnet (b) warm water (c) salt (d) sunlight
28. 28.⚖️ 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 keep it the same (c) we change it
29. 29.📘 What is yeast? (a) a tiny living fungus (b) a kind of sugar (c) a kind of stone (d) a kind of salt
30. 30.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
31. 31.⚖️ 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 measure it (c) we change it
32. 32.🧺 Do we need a magnet for the yeast balloon? (a) needed (b) not needed
33. 33.🍞 Which of these is something yeast does not need? (a) time (b) sunlight (c) sugar (d) warm water
34. 34.True or false: sugar 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? What do we do with “the same bottles”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.🔍 Which is the odd one out? (a) sunlight (b) vinegar (c) time (d) salt
37. 37.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a magnet (b) a small bottle (c) sugar (d) warm water
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
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) the water temperature (c) size of the balloon
40. 40.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it

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