Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 543 · 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.True or false: a compass needle works by air pressure. (a) False (b) True
2. 2.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
3. 3.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a magnetic chess set (d) a medicine dropper
4. 4.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
5. 5.🧺 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 balloon
6. 6.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
7. 7.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.⚖️ 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 glass (b) whether the card stays (c) the same card (d) how full the glass is
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a glass of water (d) a sink or a bucket
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) yeast (c) a glass of water (d) a battery cell
11. 11.True or false: a bicycle pump works by magnetism. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) a bicycle pump (b) a vacuum cleaner (c) a medicine dropper (d) a compass needle
13. 13.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.True or false: a fridge magnet works by magnetism. (a) False (b) True
15. 15.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic chess set (c) a vacuum cleaner (d) a bicycle pump
16. 16.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) yeast (d) a magnet
18. 18.⚖️ 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) how full the glass is (b) the way we turn it (c) whether the card stays (d) the same card
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) a towel (d) a stiff postcard
20. 20.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a sink or a bucket (c) a stiff postcard (d) a glass of water
23. 23.⚖️ 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) True (b) False
24. 24.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) juice likes plastic (d) air pushes it up
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) yeast (d) a sink or a bucket
26. 26.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a magnetic chess set (d) a vacuum cleaner
27. 27.True or false: a drinking straw works by air pressure. (a) True (b) False
28. 28.⚖️ 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 keep it the same (b) we measure it (c) we change it
29. 29.🔍 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 card flies away (d) the glass breaks
30. 30.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a vacuum cleaner (d) a fridge magnet
31. 31.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a medicine dropper (c) a bicycle pump (d) a fridge magnet
32. 32.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) over a laptop (d) near a plug point
34. 34.🛟 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
35. 35.⚖️ 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) False (b) True
36. 36.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to catch any spills (d) to make it rain
37. 37.⚖️ 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 change it (c) we measure it
38. 38.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a suction hook
39. 39.🧺 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 magnet (d) a towel
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a mirror (d) a stiff postcard

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