Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 603 · 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) turmeric powder (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a magnet (c) a sink or a bucket (d) a balloon
3. 3.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the glass breaks (d) the water turns to ice
4. 4.True or false: a compass needle works by air pressure. (a) True (b) False
5. 5.⚖️ 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
6. 6.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) air pushes it up (c) the straw is magnetic (d) the straw is hot
8. 8.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.⚖️ 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
11. 11.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.⚖️ 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) whether the card stays (b) the same card (c) how full the glass is (d) the same glass
13. 13.🧺 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 towel (c) a stiff postcard (d) a magnet
14. 14.⚖️ 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) whether the card stays (c) how full the glass is (d) the same glass
15. 15.⚖️ 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
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic
17. 17.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.🧺 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 towel
19. 19.True or false: a drinking straw works by magnetism. (a) True (b) False
20. 20.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a suction hook
21. 21.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) over a laptop (d) on a bed
23. 23.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.⚖️ 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
26. 26.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
27. 27.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.⚖️ 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 measure it (c) we change it
31. 31.⚖️ 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
32. 32.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a bicycle pump
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a mirror (d) a glass of water
35. 35.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🧺 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) yeast
37. 37.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
38. 38.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
39. 39.🔮 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 grow plants (d) to catch any spills
40. 40.True or false: a bicycle pump works by air pressure. (a) True (b) False

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