Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 494 · 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 balloon is not needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) turmeric powder (d) a towel
3. 3.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
4. 4.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🧺 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
6. 6.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a suction hook (d) a magnetic pin holder
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a towel (c) a glass of water (d) a stiff postcard
8. 8.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a bicycle pump (d) a compass needle
9. 9.🥛 Which of these works by magnetism? (a) a suction hook (b) a fridge magnet (c) a medicine dropper (d) a vacuum cleaner
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a sink or a bucket (d) a towel
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a mirror (d) a towel
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a sink or a bucket (d) a glass of water
13. 13.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.⚖️ 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) the way we turn it (c) how full the glass is (d) whether the card stays
15. 15.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is heavier (d) it is magnetic
16. 16.True or false: a suction hook works by air pressure. (a) True (b) False
17. 17.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a bicycle pump
18. 18.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) air pushes it up (d) juice likes plastic
19. 19.True or false: a drinking straw works by air pressure. (a) True (b) False
20. 20.🔮 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) air inside pushes back (d) the bottle is magnetic
21. 21.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
22. 22.⚖️ 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
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a mirror
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a sink or a bucket (d) a stiff postcard
25. 25.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
26. 26.⚖️ 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 what we measure. (a) False (b) True
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 glass breaks (c) the water turns to ice (d) the card flies away
28. 28.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
29. 29.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a drinking straw (c) a compass needle (d) a magnetic chess set
31. 31.True or false: a medicine dropper works by magnetism. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a drinking straw (d) a fridge magnet
33. 33.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
34. 34.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) sand (d) air
35. 35.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to grow plants (d) to make it rain
36. 36.⚖️ 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
37. 37.True or false: a fridge magnet works by magnetism. (a) True (b) False
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a magnet (d) yeast
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) yeast
40. 40.⚖️ 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 change it (b) we keep it the same (c) we measure it

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