Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 761 · 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? Which of these is what we measure? (a) whether the card stays (b) the same glass (c) the way we turn it (d) the same card
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
3. 3.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a medicine dropper (d) a suction hook
4. 4.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) yeast (c) a towel (d) a mirror
5. 5.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
6. 6.⚖️ 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 measure it (b) we change it (c) we keep it the same
7. 7.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to make it rain (d) to grow plants
8. 8.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.⚖️ 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
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.⚖️ 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 way we turn it (c) how full the glass is
12. 12.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) the card gets wet (d) water is heavier
13. 13.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) the straw is magnetic (d) air pushes it up
14. 14.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic chess set (c) a vacuum cleaner (d) a bicycle pump
15. 15.⚖️ 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 keep it the same (b) we change it (c) we measure it
16. 16.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.⚖️ 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
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
19. 19.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
21. 21.⚖️ 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
22. 22.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a suction hook (c) a magnetic pin holder (d) a magnetic chess set
23. 23.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a medicine dropper (d) a compass needle
25. 25.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
26. 26.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) yeast
28. 28.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.True or false: a compass needle works by air pressure. (a) False (b) True
30. 30.🔍 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 stays on (d) the card flies away
31. 31.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🥛 Which of these works by air pressure? (a) a drinking straw (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
34. 34.⚖️ 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
35. 35.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) over a laptop (d) near a plug point
36. 36.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
38. 38.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a bicycle pump (d) a fridge magnet
39. 39.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🥛 Which of these works by magnetism? (a) a compass needle (b) a vacuum cleaner (c) a bicycle pump (d) a suction hook

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