Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 52 · 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.⚖️ 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
2. 2.🔍 Which is the odd one out? (a) a magnetic chess set (b) a medicine dropper (c) a drinking straw (d) a suction hook
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a magnet
4. 4.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a vacuum cleaner (c) a drinking straw (d) a medicine dropper
6. 6.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
7. 7.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a towel (c) a glass of water (d) a sink or a bucket
9. 9.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a balloon (d) a battery cell
11. 11.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) air pushes it up (d) the straw is magnetic
12. 12.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a medicine dropper (c) a suction hook (d) a vacuum cleaner
13. 13.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a suction hook (c) a compass needle (d) a magnetic pin holder
14. 14.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the way we turn it (b) how full the glass is (c) the same glass (d) whether the card stays
16. 16.🧺 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 stiff postcard (d) a mirror
17. 17.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
18. 18.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a towel (d) turmeric powder
19. 19.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
21. 21.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
24. 24.⚖️ 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
25. 25.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the bottle is magnetic (d) the cap is sticky
26. 26.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
27. 27.True or false: a compass needle works by magnetism. (a) True (b) False
28. 28.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a glass of water (d) a mirror
30. 30.⚖️ 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
31. 31.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a vacuum cleaner (c) a magnetic chess set (d) a medicine dropper
32. 32.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
34. 34.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) magnetism (c) friction (d) sunlight
35. 35.True or false: a suction hook works by magnetism. (a) False (b) True
36. 36.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) a towel (d) a battery cell
38. 38.True or false: a medicine dropper works by air pressure. (a) False (b) True
39. 39.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a bicycle pump (c) a fridge magnet (d) a magnetic chess set
40. 40.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False

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