Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 722 · 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? What do we do with “how full the glass is”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.True or false: a compass needle works by magnetism. (a) False (b) True
4. 4.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) air pressure (d) magnetism
6. 6.⚖️ 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 way we turn it (b) how full the glass is (c) the same card (d) whether the card stays
7. 7.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
8. 8.🥤 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
9. 9.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a drinking straw (d) a magnetic chess set
10. 10.True or false: a compass needle works by air pressure. (a) True (b) False
11. 11.⚖️ 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 way we turn it (b) whether the card stays (c) how full the glass is (d) the same glass
12. 12.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
13. 13.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a fridge magnet (d) a drinking straw
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a mirror (d) yeast
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a sink or a bucket (d) yeast
17. 17.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
18. 18.⚖️ 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
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
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 same glass”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the bottle is magnetic (d) the cap is sticky
23. 23.⚖️ 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 kept the same. (a) True (b) False
24. 24.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a bicycle pump
26. 26.🛟 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
27. 27.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) it looks nicer (d) water is heavier
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a balloon (d) a battery cell
29. 29.⚖️ 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
30. 30.⚖️ 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
31. 31.True or false: a suction hook works by air pressure. (a) False (b) True
32. 32.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we measure it (c) we keep it the same
34. 34.🧺 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 battery cell (d) a sink or a bucket
35. 35.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a towel (d) a stiff postcard
37. 37.⚖️ 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
38. 38.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) a magnet (d) the cold water
39. 39.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a drinking straw (d) a magnetic chess set
40. 40.⚖️ 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) True (b) False

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