Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 364 · 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.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) sand (d) water
2. 2.🧺 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
3. 3.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to cool the glass (d) to grow plants
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a glass of water (d) a sink or a bucket
5. 5.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
6. 6.🔍 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
7. 7.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a bicycle pump (d) a fridge magnet
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
9. 9.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a battery cell (d) a sink or a bucket
11. 11.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a medicine dropper (d) a fridge magnet
13. 13.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a drinking straw (d) a fridge magnet
15. 15.⚖️ 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 the one thing we change. (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) the same card (b) the same glass (c) whether the card stays (d) how full the glass is
17. 17.True or false: a medicine dropper works by air pressure. (a) True (b) False
18. 18.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.⚖️ 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 the one thing we change. (a) True (b) False
20. 20.⚖️ 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) True (b) False
21. 21.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) over a laptop (d) on a bed
22. 22.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a magnetic pin holder (d) a vacuum cleaner
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a towel (d) turmeric powder
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a glass of water (d) a magnet
26. 26.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
27. 27.⚖️ 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 way we turn it (b) the same card (c) how full the glass is (d) whether the card stays
28. 28.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) a magnet (d) the cold water
29. 29.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) the card gets wet (d) it looks nicer
30. 30.True or false: a suction hook works by air pressure. (a) False (b) True
31. 31.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🧺 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 stiff postcard (c) a glass of water (d) yeast
33. 33.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
34. 34.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
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 measure it (b) we change it (c) we keep it the same
37. 37.⚖️ 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 way we turn it
38. 38.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there
39. 39.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a drinking straw
40. 40.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a compass needle (d) a medicine dropper

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