Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 71 · 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.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a drinking straw
2. 2.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.⚖️ 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 measure it (b) we keep it the same (c) we change it
4. 4.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
5. 5.True or false: a compass needle works by magnetism. (a) False (b) True
6. 6.⚖️ 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) True (b) False
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a balloon (d) a magnet
8. 8.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) air pushing up (d) a magnet
9. 9.🔍 Which is the odd one out? (a) a fridge magnet (b) a vacuum cleaner (c) a suction hook (d) a drinking straw
10. 10.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a medicine dropper (c) a bicycle pump (d) a drinking straw
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 measure it (c) we keep it the same
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a sink or a bucket (c) a glass of water (d) a towel
13. 13.⚖️ 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 change it (b) we keep it the same (c) we measure it
14. 14.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
15. 15.⚖️ 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) whether the card stays (c) the same card (d) the way we turn it
16. 16.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the water turns to ice (c) the glass breaks (d) the card flies away
18. 18.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
19. 19.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
20. 20.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) air pushes it up (d) juice likes plastic
22. 22.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a suction hook (d) a magnetic chess set
23. 23.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a magnetic pin holder (d) a fridge magnet
24. 24.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) little air left inside (d) water is heavier
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a glass of water (d) turmeric powder
28. 28.⚖️ 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 keep it the same (b) we measure it (c) we change it
29. 29.True or false: a bicycle pump works by magnetism. (a) False (b) True
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a battery cell (d) a glass of water
31. 31.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) water is hiding there (d) the cap is sticky
36. 36.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to catch any spills (d) to grow plants
37. 37.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is what we measure. (a) True (b) False
40. 40.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False

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