Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 288 · 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 does not need? (a) sugar (b) time (c) sunlight (d) warm water
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 yeast (b) the water temperature (c) the amount of water (d) the amount of sugar
3. 3.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) very salty (d) warm, not hot
4. 4.True or false: warm water is needed for the yeast balloon. (a) False (b) True
5. 5.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
6. 6.True or false: a small bottle is needed for the yeast balloon. (a) False (b) True
7. 7.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a magnet (c) warm water (d) a paper clip
8. 8.🍞 Which of these is something yeast needs? (a) sugar (b) vinegar (c) a magnet (d) salt
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) a paper clip (d) a small bottle
12. 12.🔍 Which is the odd one out? (a) warm water (b) a magnet (c) sugar (d) time
13. 13.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) dry yeast (c) a magnet (d) a small bottle
16. 16.True or false: salt is something yeast needs. (a) True (b) False
17. 17.🧺 Do we need a paper clip for the yeast balloon? (a) not needed (b) needed
18. 18.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.🍞 Why do we add sugar to the yeast? (a) to colour it (b) to make it sweet (c) to make it heavy (d) it is food for yeast
20. 20.🔍 Which is the odd one out? (a) time (b) vinegar (c) salt (d) a magnet
21. 21.⚖️ 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
22. 22.🔍 Which is the odd one out? (a) sunlight (b) time (c) warm water (d) sugar
23. 23.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
24. 24.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it glows (b) it grows faster (c) it turns to sugar (d) the yeast is killed
25. 25.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) warm water (d) vinegar
26. 26.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
27. 27.🧺 Do we need a balloon for the yeast balloon? (a) not needed (b) needed
28. 28.🔍 Which is the odd one out? (a) warm water (b) salt (c) sugar (d) time
29. 29.🔍 Which is the odd one out? (a) warm water (b) sunlight (c) a magnet (d) salt
30. 30.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) a small bottle (d) a comb
31. 31.🍞 Which of these is something yeast does not need? (a) sugar (b) salt (c) time (d) warm water
32. 32.🧺 Do we need a small bottle for the yeast balloon? (a) not needed (b) needed
33. 33.📘 What is yeast? (a) a kind of stone (b) a kind of sugar (c) a tiny living fungus (d) a kind of salt
34. 34.🧺 Do we need sugar for the yeast balloon? (a) needed (b) not needed
35. 35.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a mirror (c) dry yeast (d) sugar
36. 36.🍞 Why does yeast work slowly in cold water? (a) cold makes it pink (b) cold kills sugar (c) cold water is heavy (d) cold slows yeast down
37. 37.⚖️ 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
38. 38.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) throw it at a wall (c) put it in your mouth (d) keep it for a month
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) sugar (d) a mirror
40. 40.True or false: vinegar is something yeast needs. (a) True (b) False

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