Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 330 · 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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a stiff postcard (d) a glass of water
2. 2.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) the cold water (d) air pushing up
3. 3.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🔍 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 stays on (c) the card flies away (d) the water turns to ice
5. 5.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
6. 6.🧺 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) yeast
7. 7.⚖️ 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) True (b) False
8. 8.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
11. 11.⚖️ 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 way we turn it (d) the same glass
12. 12.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a balloon (d) a towel
14. 14.🔍 Which is the odd one out? (a) a magnetic chess set (b) a medicine dropper (c) a vacuum cleaner (d) a suction hook
15. 15.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) little air left inside (d) water is heavier
16. 16.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
17. 17.🔮 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
18. 18.🛟 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
19. 19.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.⚖️ 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
21. 21.⚖️ 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 change it (c) we keep it the same
22. 22.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) juice likes plastic (d) the straw is magnetic
23. 23.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) friction (d) air pressure
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 towel (b) a stiff postcard (c) yeast (d) a glass of water
26. 26.⚖️ 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 glass (b) whether the card stays (c) the same card (d) how full the glass is
27. 27.⚖️ 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 way we turn it
28. 28.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a sink or a bucket (d) a towel
30. 30.⚖️ 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) the same card (c) whether the card stays
31. 31.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
32. 32.True or false: a bicycle pump works by air pressure. (a) False (b) True
33. 33.⚖️ 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
34. 34.True or false: a suction hook works by air pressure. (a) False (b) True
35. 35.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
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) the same glass (b) how full the glass is (c) whether the card stays
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a magnet
38. 38.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) a mirror
40. 40.🥛 Which of these works by magnetism? (a) a compass needle (b) a medicine dropper (c) a suction hook (d) a drinking straw

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