Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 44 · 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.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) yeast (d) a glass of water
2. 2.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
5. 5.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a bicycle pump (d) a medicine dropper
6. 6.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.🔮 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 bottle is magnetic (d) the cap is sticky
8. 8.True or false: a compass needle works by air pressure. (a) False (b) True
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 what we measure. (a) False (b) True
10. 10.🔍 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
11. 11.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.True or false: a bicycle pump works by air pressure. (a) False (b) True
13. 13.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
14. 14.True or false: a fridge magnet works by air pressure. (a) True (b) False
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) yeast (c) a stiff postcard (d) a towel
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a glass of water (d) a balloon
17. 17.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
18. 18.⚖️ 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 keep it the same (c) we measure it
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) how full the glass is (b) whether the card stays (c) the way we turn it (d) the same card
20. 20.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a vacuum cleaner (d) a fridge magnet
21. 21.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
23. 23.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.🔮 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
25. 25.⚖️ 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 what we measure. (a) True (b) False
26. 26.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) friction (c) sunlight (d) magnetism
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a magnet (d) a sink or a bucket
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a mirror (d) a sink or a bucket
29. 29.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.⚖️ 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
31. 31.⚖️ 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 the one thing we change. (a) False (b) True
32. 32.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a medicine dropper (d) a magnetic chess set
34. 34.⚖️ 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 measure it (b) we change it (c) we keep it the same
35. 35.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a bicycle pump (c) a suction hook (d) a fridge magnet
36. 36.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a fridge magnet (d) a magnetic chess set
38. 38.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) glue on the card (d) a magnet
40. 40.True or false: a magnetic chess set works by air pressure. (a) True (b) False

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