Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 606 · 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 compass needle works by air pressure. (a) True (b) False
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) how full the glass is (b) whether the card stays (c) the same glass
3. 3.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) the cap is sticky (d) water is hiding there
5. 5.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a laptop (d) over a sink or bucket
7. 7.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a towel (c) a magnet (d) a stiff postcard
9. 9.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a suction hook
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
11. 11.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
12. 12.True or false: a bicycle pump works by magnetism. (a) False (b) True
13. 13.🥛 Which of these works by magnetism? (a) a drinking straw (b) a medicine dropper (c) a bicycle pump (d) a compass needle
14. 14.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
15. 15.True or false: a fridge magnet works by magnetism. (a) True (b) False
16. 16.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.True or false: a medicine dropper works by magnetism. (a) False (b) True
18. 18.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
19. 19.⚖️ 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) False (b) True
20. 20.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
21. 21.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.⚖️ 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
23. 23.⚖️ 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 what we measure. (a) False (b) True
24. 24.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a magnet (c) a sink or a bucket (d) a balloon
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) True (b) False
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) a glass of water (d) a towel
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) turmeric powder (d) a stiff postcard
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a towel (d) a balloon
30. 30.True or false: a suction hook works by magnetism. (a) True (b) False
31. 31.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a magnetic chess set (d) a drinking straw
33. 33.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a bicycle pump (d) a medicine dropper
34. 34.⚖️ 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) True (b) False
35. 35.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to grow plants (d) to make it rain
38. 38.True or false: a drinking straw works by magnetism. (a) False (b) True
39. 39.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a stiff postcard (c) a glass of water (d) turmeric powder

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