Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 622 · 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 compass needle works by magnetism. (a) False (b) True
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a towel (d) a sink or a bucket
3. 3.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a compass needle (d) a fridge magnet
5. 5.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.True or false: a compass needle works by air pressure. (a) True (b) False
7. 7.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
8. 8.🔍 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
9. 9.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) smoke (d) water
10. 10.⚖️ 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) whether the card stays (c) how full the glass is
11. 11.🧺 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 stiff postcard (d) yeast
12. 12.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) a drinking straw (b) a vacuum cleaner (c) a fridge magnet (d) a medicine dropper
14. 14.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a medicine dropper (d) a bicycle pump
15. 15.🔮 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
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.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a medicine dropper (d) a magnetic pin holder
20. 20.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a bicycle pump (d) a magnetic pin holder
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a towel (d) a mirror
22. 22.🧺 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 stiff postcard (d) a magnet
23. 23.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
25. 25.🧺 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 mirror
26. 26.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.⚖️ 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
28. 28.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
31. 31.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.⚖️ 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
34. 34.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a battery cell (d) a stiff postcard
36. 36.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) turmeric powder (c) yeast (d) a sink or a bucket
38. 38.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
39. 39.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a balloon (d) a magnet

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