Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 128 · 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 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
2. 2.🔮 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
3. 3.🛟 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
4. 4.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a magnetic pin holder (d) a compass needle
5. 5.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a bicycle pump (d) a vacuum cleaner
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 the one thing we change. (a) False (b) True
7. 7.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.🔍 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 water turns to ice (c) the card flies away (d) the glass breaks
9. 9.⚖️ 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) False (b) True
10. 10.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a suction hook
11. 11.True or false: a bicycle pump 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) a stiff postcard (b) a glass of water (c) a towel (d) a balloon
13. 13.🥛 Which of these works by magnetism? (a) a drinking straw (b) a medicine dropper (c) a bicycle pump (d) a magnetic pin holder
14. 14.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
15. 15.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) the cold water (d) air pushing up
16. 16.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
17. 17.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.⚖️ 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) how full the glass is (c) whether the card stays (d) the way we turn it
20. 20.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
21. 21.⚖️ 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
22. 22.⚖️ 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
23. 23.True or false: a bicycle pump works by air pressure. (a) True (b) False
24. 24.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a balloon (d) a stiff postcard
26. 26.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) air pushes it up (c) the straw is magnetic (d) the straw is hot
27. 27.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a vacuum cleaner (d) a compass needle
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a mirror
29. 29.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) turmeric powder (c) a stiff postcard (d) a glass of water
31. 31.⚖️ 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 change it (b) we measure it (c) we keep it the same
32. 32.True or false: a drinking straw works by magnetism. (a) False (b) True
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) a glass of water (d) yeast
34. 34.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.⚖️ 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 way we turn it (c) whether the card stays
36. 36.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.⚖️ 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 kept the same. (a) True (b) False
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a magnet (d) yeast
39. 39.True or false: a drinking straw works by air pressure. (a) True (b) False
40. 40.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism

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