Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 804 · 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.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the card stays on (d) the water turns to ice
2. 2.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a bicycle pump (d) a compass needle
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a sink or a bucket (d) a mirror
4. 4.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) yeast (c) a glass of water (d) turmeric powder
5. 5.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a magnet (c) a towel (d) a stiff postcard
7. 7.⚖️ 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 measure it (b) we change it (c) we keep it the same
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) yeast (d) a towel
9. 9.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
10. 10.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a drinking straw
11. 11.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
12. 12.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a magnetic chess set (d) a medicine dropper
13. 13.⚖️ 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 keep it the same (b) we measure it (c) we change it
14. 14.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) air pushes it up (d) juice likes plastic
15. 15.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
17. 17.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a magnetic pin holder (d) a suction hook
19. 19.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
20. 20.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
21. 21.⚖️ 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
22. 22.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a glass of water (d) a towel
25. 25.True or false: a bicycle pump works by air pressure. (a) False (b) True
26. 26.True or false: a compass needle works by magnetism. (a) True (b) False
27. 27.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
28. 28.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.True or false: a magnetic chess set works by air pressure. (a) False (b) True
30. 30.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.True or false: a bicycle pump works by magnetism. (a) True (b) False
32. 32.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) a medicine dropper (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a glass of water (d) a stiff postcard
35. 35.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a medicine dropper
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) how full the glass is (b) whether the card stays (c) the same glass
37. 37.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) yeast (d) a towel
39. 39.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a magnetic pin holder (d) a fridge magnet
40. 40.⚖️ 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

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