Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 276 · 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.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
2. 2.True or false: a bicycle pump works by air pressure. (a) False (b) True
3. 3.⚖️ 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) how full the glass is (b) the same glass (c) the same card (d) the way we turn it
4. 4.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a compass needle (d) a suction hook
5. 5.True or false: a magnetic chess set works by magnetism. (a) True (b) False
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 kept the same. (a) False (b) True
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) yeast (d) a battery cell
8. 8.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
9. 9.⚖️ 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 change it (c) we measure it
10. 10.🧺 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 mirror (c) a glass of water (d) a stiff postcard
11. 11.🧺 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
12. 12.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a medicine dropper (d) a fridge magnet
13. 13.⚖️ 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
14. 14.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a fridge magnet (d) a compass needle
16. 16.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.⚖️ 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) the same card (d) how full the glass is
18. 18.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a vacuum cleaner (d) a suction hook
19. 19.True or false: a drinking straw works by magnetism. (a) True (b) False
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a bicycle pump
22. 22.🥛 Which of these works by air pressure? (a) a suction hook (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a towel (d) a glass of water
24. 24.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.🔍 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 card flies away (c) the glass breaks (d) the water turns to ice
28. 28.True or false: a suction hook works by air pressure. (a) False (b) True
29. 29.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
31. 31.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) yeast (d) a balloon
33. 33.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
34. 34.⚖️ 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) False (b) True
35. 35.🔮 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) air inside pushes back (d) water is hiding there
36. 36.⚖️ 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 kept the same. (a) False (b) True
37. 37.True or false: a medicine dropper works by magnetism. (a) True (b) False
38. 38.True or false: a compass needle works by air pressure. (a) True (b) False
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a balloon
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) turmeric powder (d) a sink or a bucket

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