Air Pressure Experiment Worksheet

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