Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 460 · 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 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
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a vacuum cleaner (d) a drinking straw
4. 4.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) the card gets wet (d) it looks nicer
5. 5.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a sink or a bucket (d) turmeric powder
6. 6.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.True or false: a drinking straw works by air pressure. (a) False (b) True
8. 8.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) air pushes it up (d) the straw is hot
9. 9.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a medicine dropper
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a towel (d) a balloon
12. 12.⚖️ 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 way we turn it
13. 13.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a magnetic pin holder (d) a suction hook
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) True (b) False
16. 16.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
18. 18.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) sand (d) air
21. 21.⚖️ 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
22. 22.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) near a plug point (d) on a bed
23. 23.⚖️ 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) the same glass (c) whether the card stays
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 hotter (d) it is magnetic
25. 25.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
26. 26.⚖️ 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
27. 27.True or false: a fridge magnet works by air pressure. (a) True (b) False
28. 28.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.🔍 Which is the odd one out? (a) a compass needle (b) a vacuum cleaner (c) a magnetic pin holder (d) a magnetic chess set
30. 30.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the glass breaks (d) the card stays on
31. 31.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a vacuum cleaner (d) a magnetic chess set
32. 32.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a fridge magnet (d) a suction hook
33. 33.⚖️ 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
34. 34.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🧺 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) a stiff postcard (d) a mirror
36. 36.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.🧺 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) a magnet
38. 38.⚖️ 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
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) a glass of water (d) a balloon

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