Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 315 · 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.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a magnet (c) a sink or a bucket (d) a stiff postcard
3. 3.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
4. 4.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a magnetic chess set (d) a bicycle pump
5. 5.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.True or false: a medicine dropper works by magnetism. (a) True (b) False
7. 7.🧺 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 glass of water (c) yeast (d) a towel
8. 8.🧺 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 mirror
9. 9.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
11. 11.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
12. 12.⚖️ 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 kept the same. (a) False (b) True
13. 13.⚖️ 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 same card (b) how full the glass is (c) the same glass (d) whether the card stays
14. 14.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) water is heavier (d) the card gets wet
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a glass of water (d) turmeric powder
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.True or false: a medicine dropper works by air pressure. (a) True (b) False
18. 18.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
19. 19.⚖️ 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) the same card (b) how full the glass is (c) whether the card stays
20. 20.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card stays on (c) the glass breaks (d) the card flies away
21. 21.⚖️ 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) whether the card stays (b) the way we turn it (c) how full the glass is
22. 22.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.🛟 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
25. 25.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
27. 27.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a battery cell (d) a sink or a bucket
28. 28.🔍 Which is the odd one out? (a) a drinking straw (b) a compass needle (c) a magnetic chess set (d) a magnetic pin holder
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) turmeric powder (c) a sink or a bucket (d) a towel
30. 30.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a vacuum cleaner (c) a compass needle (d) a fridge magnet
32. 32.⚖️ 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
33. 33.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a sink or a bucket (d) a towel
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a balloon (c) a battery cell (d) a mirror
36. 36.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a drinking straw (c) a suction hook (d) a bicycle pump
37. 37.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) yeast (c) turmeric powder (d) a glass of water
39. 39.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.⚖️ 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

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