Air Pressure Experiment Worksheet

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

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