Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 491 · 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 stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
2. 2.⚖️ 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 measure it (c) we change it
3. 3.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a fridge magnet (d) a magnetic chess set
4. 4.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a bicycle pump (c) a compass needle (d) a magnetic pin holder
5. 5.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
6. 6.⚖️ 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 what we measure. (a) False (b) True
7. 7.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
8. 8.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a laptop (d) over a sink or bucket
9. 9.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a stiff postcard (c) a towel (d) a glass of water
13. 13.True or false: a drinking straw works by air pressure. (a) False (b) True
14. 14.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a suction hook (c) a magnetic pin holder (d) a compass needle
15. 15.True or false: a suction hook works by magnetism. (a) True (b) False
16. 16.⚖️ 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 keep it the same (b) we change it (c) we measure it
17. 17.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) turmeric powder (c) a battery cell (d) a mirror
19. 19.True or false: a fridge magnet works by air pressure. (a) True (b) False
20. 20.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
21. 21.🧺 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) turmeric powder
22. 22.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
23. 23.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a magnet (d) a stiff postcard
25. 25.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic pin holder (c) a drinking straw (d) a vacuum cleaner
26. 26.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
27. 27.🧺 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 sink or a bucket (d) a magnet
28. 28.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.True or false: a drinking straw works by magnetism. (a) True (b) False
30. 30.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.⚖️ 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
32. 32.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a drinking straw (c) a suction hook (d) a bicycle pump
33. 33.⚖️ 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 kept the same. (a) False (b) True
34. 34.⚖️ 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
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) turmeric powder (d) a mirror
36. 36.⚖️ 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
37. 37.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the glass breaks (d) the card stays on
38. 38.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
39. 39.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False

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