Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 910 · 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 same card”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a vacuum cleaner
3. 3.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) a stiff postcard (d) a sink or a bucket
4. 4.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
5. 5.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
6. 6.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to grow plants (d) to cool the glass
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) turmeric powder (c) a glass of water (d) a sink or a bucket
8. 8.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a drinking straw (d) a fridge magnet
11. 11.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a laptop (d) over a sink or bucket
12. 12.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a drinking straw (d) a compass needle
13. 13.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a mirror (c) a stiff postcard (d) turmeric powder
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 keep it the same (c) we change it
16. 16.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a mirror (c) a towel (d) turmeric powder
17. 17.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a towel (c) a sink or a bucket (d) a stiff postcard
19. 19.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a sink or a bucket (d) a towel
21. 21.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
22. 22.🔮 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
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 glass (b) whether the card stays (c) how full the glass is (d) the way we turn it
24. 24.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
25. 25.⚖️ 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 kept the same. (a) True (b) False
26. 26.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a glass of water (d) a towel
27. 27.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
29. 29.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a medicine dropper (c) a suction hook (d) a magnetic chess set
31. 31.⚖️ 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) how full the glass is (c) the same card (d) the way we turn it
32. 32.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.True or false: a suction hook works by magnetism. (a) False (b) True
34. 34.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) air pressure (d) friction
35. 35.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
36. 36.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
38. 38.🔍 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 flies away (c) the glass breaks (d) the card stays on
39. 39.⚖️ 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
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) a magnet (d) a glass of water

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