Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 435 · 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 works by air pressure? (a) a vacuum cleaner (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
2. 2.🧺 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 magnet (d) a stiff postcard
3. 3.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) air pushing up (d) glue on the card
4. 4.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic pin holder (c) a magnetic chess set (d) a fridge magnet
5. 5.True or false: a bicycle pump works by air pressure. (a) False (b) True
6. 6.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
7. 7.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a drinking straw (d) a magnetic chess set
9. 9.⚖️ 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
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a towel (c) a glass of water (d) a stiff postcard
11. 11.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
12. 12.🛟 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
13. 13.True or false: a bicycle pump works by magnetism. (a) False (b) True
14. 14.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a magnetic chess set (d) a medicine dropper
15. 15.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to grow plants (d) to cool the glass
16. 16.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
17. 17.⚖️ 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
18. 18.True or false: a medicine dropper works by air pressure. (a) True (b) False
19. 19.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
20. 20.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a vacuum cleaner (d) a suction hook
21. 21.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.⚖️ 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) the same card (c) how full the glass is (d) whether the card stays
23. 23.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
24. 24.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
25. 25.True or false: a magnetic chess set works by air pressure. (a) True (b) False
26. 26.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) the card gets wet (d) it looks nicer
27. 27.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.🔍 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 glass breaks (d) the card flies away
29. 29.⚖️ 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) the same card (b) how full the glass is (c) whether the card stays
30. 30.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
31. 31.🧺 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) yeast (d) a sink or a bucket
32. 32.True or false: a compass needle works by air pressure. (a) True (b) False
33. 33.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) sunlight (c) magnetism (d) friction
34. 34.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a magnetic pin holder (d) a fridge magnet
35. 35.⚖️ 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 way we turn it (b) the same card (c) how full the glass is (d) whether the card stays
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 same card”? (a) we keep it the same (b) we change it (c) we measure it
37. 37.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a bicycle pump (d) a magnetic pin holder
38. 38.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a magnetic chess set (d) a magnetic pin holder
40. 40.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False

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