Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 420 · 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.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is the one thing we change. (a) True (b) False
2. 2.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
3. 3.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a magnetic chess set (d) a magnetic pin holder
6. 6.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
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 what we measure. (a) True (b) False
8. 8.⚖️ 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 keep it the same (c) we change it
9. 9.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) it looks nicer (d) little air left inside
11. 11.🔍 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 card stays on (d) the glass breaks
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a stiff postcard (c) a magnet (d) a mirror
13. 13.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a glass of water (d) a sink or a bucket
17. 17.⚖️ 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) how full the glass is (b) the way we turn it (c) the same card (d) whether the card stays
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a balloon (c) a magnet (d) a glass of water
20. 20.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic chess set (c) a vacuum cleaner (d) a medicine dropper
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) turmeric powder (d) a mirror
23. 23.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
24. 24.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.⚖️ 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
26. 26.⚖️ 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) True (b) False
27. 27.⚖️ 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
28. 28.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) air pushes it up (c) the straw is hot (d) juice likes plastic
29. 29.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a drinking straw (d) a compass needle
33. 33.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
34. 34.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) over a sink or bucket (d) on a bed
35. 35.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
36. 36.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a stiff postcard (c) a towel (d) a glass of water
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is what we measure. (a) False (b) True
39. 39.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) sunlight (c) magnetism (d) friction
40. 40.⚖️ 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

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