Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 702 · 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.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) the card gets wet (d) it looks nicer
2. 2.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
3. 3.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a vacuum cleaner
4. 4.⚖️ 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 same card (b) how full the glass is (c) the same glass (d) the way we turn it
5. 5.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.⚖️ 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
7. 7.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
8. 8.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) air pushes it up (d) juice likes plastic
9. 9.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
11. 11.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a bicycle pump (d) a magnetic pin holder
12. 12.🔍 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 flies away (d) the card stays on
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a towel (c) a glass of water (d) a sink or a bucket
14. 14.🧺 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 stiff postcard (c) a glass of water (d) a mirror
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a towel (c) a sink or a bucket (d) a glass of water
16. 16.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a bicycle pump (d) a drinking straw
17. 17.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a balloon (d) a sink or a bucket
20. 20.True or false: a magnetic chess set works by magnetism. (a) False (b) True
21. 21.🧺 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 stiff postcard (d) a battery cell
22. 22.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
24. 24.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
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 sink or a bucket (c) a towel (d) a magnet
26. 26.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
27. 27.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
30. 30.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a magnet (d) a stiff postcard
32. 32.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
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 way we turn it”? (a) we measure it (b) we keep it the same (c) we change it
34. 34.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a compass needle (d) a medicine dropper
35. 35.⚖️ 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 card (b) how full the glass is (c) the same glass (d) whether the card stays
36. 36.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a suction hook (d) a compass needle
37. 37.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.⚖️ 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 change it (b) we measure it (c) we keep it the same
39. 39.⚖️ 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) True (b) False
40. 40.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False

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