Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 203 · 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.⚖️ 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 change it (b) we measure it (c) we keep it the same
2. 2.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic
3. 3.⚖️ 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) whether the card stays (b) the same glass (c) how full the glass is
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a towel (d) a stiff postcard
6. 6.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
7. 7.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a towel (c) turmeric powder (d) a magnet
11. 11.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) air pushes it up (d) the straw is magnetic
12. 12.True or false: a drinking straw works by magnetism. (a) True (b) False
13. 13.True or false: a bicycle pump works by magnetism. (a) False (b) True
14. 14.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) a magnet (d) air pushing up
16. 16.True or false: a magnetic chess set works by magnetism. (a) False (b) True
17. 17.🔍 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
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a magnet (d) yeast
19. 19.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
20. 20.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a suction hook (d) a medicine dropper
21. 21.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
23. 23.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.⚖️ 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) whether the card stays (b) the same glass (c) how full the glass is (d) the same card
25. 25.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
26. 26.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) turmeric powder (d) a battery cell
27. 27.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
28. 28.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a suction hook (d) a magnetic chess set
29. 29.True or false: a suction hook works by air pressure. (a) True (b) False
30. 30.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a medicine dropper (c) a magnetic pin holder (d) a drinking straw
31. 31.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
32. 32.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) air pressure (c) magnetism (d) friction
33. 33.True or false: a magnetic chess set works by air pressure. (a) False (b) True
34. 34.⚖️ 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) whether the card stays (b) how full the glass is (c) the same card
35. 35.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
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 measure it (c) we keep it the same
37. 37.🔍 Which is the odd one out? (a) a bicycle pump (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
38. 38.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
39. 39.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a bicycle pump (d) a compass needle
40. 40.⚖️ 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

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