Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 218 · 40 questions

What you do (Air pushes): 1. Fill a plastic glass right to the top with water. 2. Lay the postcard flat on top, covering the rim. 3. Over a sink or bucket, hold the card and turn the glass upside down. 4. Slowly take your hand away from the card and watch.

1. 1.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is the one thing we change. (a) True (b) False
3. 3.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
4. 4.🥛 Which of these works by magnetism? (a) a drinking straw (b) a compass needle (c) a medicine dropper (d) a suction hook
5. 5.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
6. 6.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
7. 7.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
9. 9.True or false: a fridge magnet works by air pressure. (a) True (b) False
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a balloon
11. 11.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
13. 13.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a bicycle pump (d) a magnetic chess set
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) yeast (d) a sink or a bucket
17. 17.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) on a bed (d) over a sink or bucket
18. 18.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
19. 19.True or false: a drinking straw works by air pressure. (a) False (b) True
20. 20.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
22. 22.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a bicycle pump
24. 24.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the glass breaks (d) the water turns to ice
25. 25.True or false: a suction hook works by magnetism. (a) True (b) False
26. 26.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
27. 27.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a mirror (d) a balloon
29. 29.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) air (d) sand
32. 32.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is kept the same. (a) True (b) False
33. 33.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is what we measure. (a) False (b) True
34. 34.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a compass needle (d) a bicycle pump
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is kept the same. (a) False (b) True
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a mirror (c) a towel (d) a sink or a bucket
39. 39.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a battery cell (d) a stiff postcard

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