Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 529 · 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 fridge magnet works by magnetism. (a) False (b) True
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) yeast (c) a towel (d) a battery cell
3. 3.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a drinking straw
4. 4.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card flies away (d) the card stays on
5. 5.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
6. 6.🛟 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
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a glass of water (d) a battery cell
8. 8.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to cool the glass (d) to make it rain
9. 9.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) glue on the card (d) the cold water
10. 10.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a medicine dropper (d) a drinking straw
11. 11.⚖️ 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 measure it (b) we keep it the same (c) we change it
12. 12.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.True or false: a magnetic chess set works by magnetism. (a) True (b) False
15. 15.⚖️ 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 glass (b) how full the glass is (c) whether the card stays (d) the same card
16. 16.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a suction hook (d) a magnetic pin holder
18. 18.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
19. 19.⚖️ 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 change it (b) we measure it (c) we keep it the same
20. 20.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.True or false: a suction hook works by magnetism. (a) False (b) True
22. 22.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic chess set (c) a suction hook (d) a drinking straw
23. 23.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a fridge magnet (d) a suction hook
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a stiff postcard (d) a balloon
25. 25.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) a sink or a bucket (d) a mirror
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
29. 29.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a medicine dropper (d) a compass needle
30. 30.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
32. 32.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a medicine dropper (c) a compass needle (d) a suction hook
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a towel (d) a stiff postcard
34. 34.True or false: a compass needle works by air pressure. (a) True (b) False
35. 35.⚖️ 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 kept the same. (a) False (b) True
36. 36.True or false: a bicycle pump works by air pressure. (a) True (b) False
37. 37.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
38. 38.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
39. 39.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a towel (d) a magnet

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