Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 137 · 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.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
2. 2.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) air inside pushes back (d) water is hiding there
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) yeast (d) a glass of water
5. 5.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
6. 6.🧺 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 magnet (d) a sink or a bucket
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a balloon (c) a stiff postcard (d) a glass of water
8. 8.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to make it rain (d) to cool the glass
11. 11.⚖️ 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 card (b) whether the card stays (c) how full the glass is (d) the same glass
12. 12.⚖️ 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
13. 13.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the glass breaks (d) the card stays on
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) yeast (d) a stiff postcard
15. 15.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
16. 16.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
17. 17.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a battery cell (c) a sink or a bucket (d) a stiff postcard
19. 19.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) the cold water (d) air pushing up
20. 20.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a compass needle (d) a suction hook
22. 22.🔍 Which is the odd one out? (a) a suction hook (b) a fridge magnet (c) a medicine dropper (d) a drinking straw
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a battery cell (d) turmeric powder
24. 24.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
25. 25.⚖️ 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 keep it the same (b) we change it (c) we measure it
26. 26.⚖️ 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) True (b) False
27. 27.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a towel (c) turmeric powder (d) a magnet
29. 29.🧺 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 glass of water (c) a towel (d) a balloon
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) a stiff postcard (d) a mirror
31. 31.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.True or false: a compass needle works by magnetism. (a) False (b) True
36. 36.🥛 Which of these works by air pressure? (a) a suction hook (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
37. 37.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a medicine dropper (d) a magnetic pin holder
38. 38.True or false: a medicine dropper works by magnetism. (a) True (b) False
39. 39.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a drinking straw (c) a bicycle pump (d) a suction hook

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