Air Pressure Experiment Worksheet

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

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