Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 450 · 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 magnetic chess set works by air pressure. (a) False (b) True
2. 2.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) how full the glass is (b) the way we turn it (c) the same card (d) the same glass
4. 4.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a drinking straw
5. 5.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) a stiff postcard (d) a mirror
7. 7.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a drinking straw (c) a bicycle pump (d) a suction hook
8. 8.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
11. 11.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
14. 14.🛟 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 hotter (d) it is magnetic
15. 15.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
17. 17.⚖️ 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 the one thing we change. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
19. 19.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a stiff postcard (d) a towel
21. 21.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a fridge magnet (d) a magnetic pin holder
22. 22.True or false: a drinking straw works by air pressure. (a) True (b) False
23. 23.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) on a bed (d) near a plug point
24. 24.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a compass needle (d) a magnetic pin holder
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a glass of water (d) a towel
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a glass of water (d) a towel
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
28. 28.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) a magnet (d) air pushing up
29. 29.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a medicine dropper (d) a fridge magnet
31. 31.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) smoke (d) water
32. 32.⚖️ 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) True (b) False
33. 33.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to cool the glass (d) to make it rain
34. 34.True or false: a drinking straw works by magnetism. (a) True (b) False
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) turmeric powder (d) a glass of water
36. 36.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) it looks nicer (d) the card gets wet
37. 37.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a fridge magnet (d) a suction hook
38. 38.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a balloon (d) a towel
40. 40.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a medicine dropper (d) a vacuum cleaner

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