Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 650 · 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) water (b) sand (c) smoke (d) air
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) water is hiding there (d) air inside pushes back
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.🥛 Which of these works by magnetism? (a) a drinking straw (b) a fridge magnet (c) a vacuum cleaner (d) a suction hook
7. 7.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) the straw is hot (d) air pushes it up
8. 8.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a drinking straw (c) a fridge magnet (d) a compass needle
9. 9.🧺 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 stiff postcard (d) a mirror
10. 10.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) glue on the card (d) a magnet
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 keep it the same (b) we change it (c) we measure it
12. 12.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a glass of water (c) a sink or a bucket (d) a towel
15. 15.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to grow plants (d) to catch any spills
16. 16.⚖️ 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
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) turmeric powder (c) a balloon (d) a mirror
18. 18.⚖️ 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) False (b) True
19. 19.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a glass of water (d) a stiff postcard
21. 21.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) it looks nicer (d) little air left inside
22. 22.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a compass needle (d) a vacuum cleaner
23. 23.⚖️ 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) the way we turn it (c) how full the glass is (d) whether the card stays
24. 24.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a compass needle (d) a magnetic pin holder
25. 25.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic chess set (c) a drinking straw (d) a vacuum cleaner
26. 26.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) True (b) False
29. 29.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a bicycle pump (b) a vacuum cleaner (c) a magnetic pin holder (d) a medicine dropper
31. 31.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
32. 32.⚖️ 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) the same card (b) how full the glass is (c) the way we turn it (d) the same glass
33. 33.True or false: a magnetic chess set works by air pressure. (a) True (b) False
34. 34.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
35. 35.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.True or false: a medicine dropper works by air pressure. (a) True (b) False
38. 38.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a medicine dropper (d) a magnetic chess set
40. 40.⚖️ 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) False (b) True

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