Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 489 · 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.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a magnet (d) a mirror
2. 2.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a compass needle (d) a medicine dropper
3. 3.🥛 Which of these works by magnetism? (a) a drinking straw (b) a medicine dropper (c) a bicycle pump (d) a magnetic pin holder
4. 4.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.True or false: a bicycle pump works by air pressure. (a) False (b) True
7. 7.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to catch any spills (d) to grow plants
8. 8.⚖️ 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) the same card (c) whether the card stays
9. 9.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a suction hook (d) a compass needle
10. 10.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a vacuum cleaner (d) a magnetic chess set
11. 11.True or false: a drinking straw works by magnetism. (a) True (b) False
12. 12.🧺 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 sink or a bucket (d) a towel
13. 13.🧺 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 towel (c) a magnet (d) a glass of water
14. 14.True or false: a bicycle pump works by magnetism. (a) True (b) False
15. 15.⚖️ 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) False (b) True
16. 16.⚖️ 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 same card (c) whether the card stays (d) the way we turn it
17. 17.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🔍 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 card stays on (d) the glass breaks
19. 19.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
20. 20.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
21. 21.True or false: a compass needle works by air pressure. (a) True (b) False
22. 22.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.⚖️ 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
24. 24.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
25. 25.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
26. 26.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a stiff postcard (c) a battery cell (d) a mirror
27. 27.🛟 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
28. 28.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.True or false: a drinking straw works by air pressure. (a) False (b) True
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a sink or a bucket (c) a towel (d) a glass of water
31. 31.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) it looks nicer (d) water is heavier
32. 32.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
34. 34.⚖️ 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) True (b) False
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
36. 36.True or false: a medicine dropper works by magnetism. (a) False (b) True
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.⚖️ 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) the same glass (c) the way we turn it (d) how full the glass is
40. 40.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a magnetic chess set (d) a magnetic pin holder

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