Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 512 · 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.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) glue on the card (d) a magnet
2. 2.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to make it rain (d) to cool the glass
3. 3.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) near a plug point (d) over a laptop
4. 4.True or false: a magnetic chess set 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? True or false: whether the card stays is the one thing we change. (a) True (b) False
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) whether the card stays (b) the same card (c) the way we turn it (d) how full the glass is
7. 7.⚖️ 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 change it (c) we measure it
8. 8.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
9. 9.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is magnetic (c) the straw is hot (d) juice likes plastic
10. 10.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.🔮 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 cap is sticky (d) the bottle is magnetic
13. 13.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a compass needle (d) a medicine dropper
14. 14.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
15. 15.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
16. 16.⚖️ 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 card (b) how full the glass is (c) whether the card stays
17. 17.🥛 Which of these works by magnetism? (a) a drinking straw (b) a magnetic chess set (c) a suction hook (d) a bicycle pump
18. 18.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the card stays on (d) the glass breaks
19. 19.⚖️ 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
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 way we turn it”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🥛 Which of these works by magnetism? (a) a drinking straw (b) a fridge magnet (c) a suction hook (d) a bicycle pump
25. 25.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a suction hook (d) a bicycle pump
26. 26.⚖️ 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
27. 27.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) a battery cell
29. 29.⚖️ 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) the same glass (d) the way we turn it
30. 30.⚖️ 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
31. 31.🧺 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 magnet (c) a towel (d) a glass of water
32. 32.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
33. 33.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a compass needle (d) a bicycle pump
34. 34.🧺 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) turmeric powder (d) a stiff postcard
35. 35.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.True or false: a compass needle works by magnetism. (a) True (b) False
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a mirror (d) yeast
38. 38.⚖️ 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
39. 39.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a suction hook (d) a fridge magnet
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) a sink or a bucket (d) a stiff postcard

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