Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 118 · 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 measure it (b) we change it (c) we keep it the same
2. 2.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) salt (d) warm water
3. 3.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it glows (c) the yeast is killed (d) it turns to sugar
4. 4.🔮 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
5. 5.🧺 Do we need a paper clip for the yeast balloon? (a) needed (b) not needed
6. 6.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
7. 7.⚖️ 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 keep it the same (c) we measure it
8. 8.⚖️ 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 water temperature (b) the amount of sugar (c) size of the balloon (d) the amount of yeast
9. 9.True or false: sunlight is something yeast needs. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) sunlight (b) time (c) warm water (d) sugar
11. 11.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) a mirror (c) sugar (d) a comb
12. 12.True or false: a paper clip is needed for the yeast balloon. (a) True (b) False
13. 13.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) a comb (c) a magnet (d) a balloon
14. 14.🧺 Do we need dry yeast for the yeast balloon? (a) needed (b) not needed
15. 15.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the same bottles is what we measure. (a) False (b) True
16. 16.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) warm, not hot (d) ice cold
17. 17.🧺 Which of these is not needed for the yeast balloon? (a) a mirror (b) sugar (c) dry yeast (d) a small bottle
18. 18.⚖️ 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 change it (b) we measure it (c) we keep it the same
19. 19.⚖️ 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 change it (b) we keep it the same (c) we measure it
20. 20.True or false: salt is something yeast does not need. (a) False (b) True
21. 21.True or false: turmeric powder is needed for the yeast balloon. (a) False (b) True
22. 22.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
23. 23.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
24. 24.True or false: sugar is something yeast needs. (a) True (b) False
25. 25.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
26. 26.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) the balloon is smaller (c) the balloon is bigger (d) it turns to bread
27. 27.🍞 Which of these is something yeast does not need? (a) time (b) sugar (c) sunlight (d) warm water
28. 28.🎈 What blows up the balloon in the yeast experiment? (a) steam (b) carbon dioxide gas (c) smoke (d) air from outside
29. 29.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a small bottle (c) a balloon (d) a comb
30. 30.True or false: a balloon is not needed for the yeast balloon. (a) True (b) False
31. 31.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) a paper clip (c) warm water (d) a small bottle
32. 32.🧺 Which of these is not needed for the yeast balloon? (a) a comb (b) sugar (c) a small bottle (d) dry yeast
33. 33.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) keep it for a month (c) pour it down the sink (d) put it in your mouth
34. 34.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to make it heavy (c) it is food for yeast (d) to colour it
35. 35.⚖️ 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 same bottles (c) the amount of sugar (d) size of the balloon
36. 36.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
37. 37.📘 What is yeast? (a) a kind of sugar (b) a kind of stone (c) a kind of salt (d) a tiny living fungus
38. 38.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
39. 39.True or false: warm water is something yeast does not need. (a) True (b) False
40. 40.⚖️ 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

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