Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 319 · 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 grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
2. 2.🔮 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
3. 3.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a suction hook (d) a magnetic pin holder
4. 4.⚖️ 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
5. 5.🔍 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 water turns to ice (d) the glass breaks
6. 6.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
7. 7.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a bicycle pump (c) a drinking straw (d) a suction hook
9. 9.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.⚖️ 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 kept the same. (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 the one thing we change? (a) whether the card stays (b) how full the glass is (c) the same card (d) the way we turn it
12. 12.🥛 Does a magnetic pin holder 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 magnetic pin holder (c) a compass needle (d) a fridge magnet
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a towel (d) a stiff postcard
15. 15.🧺 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 stiff postcard (c) a glass of water (d) yeast
16. 16.⚖️ 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) False (b) True
17. 17.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
18. 18.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
19. 19.⚖️ 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
20. 20.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a drinking straw (c) a compass needle (d) a fridge magnet
21. 21.True or false: a compass needle works by air pressure. (a) True (b) False
22. 22.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) water (c) smoke (d) sand
23. 23.🛟 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
24. 24.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) air pushes it up (d) the straw is hot
25. 25.🥛 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
26. 26.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a magnetic chess set (d) a bicycle pump
27. 27.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a medicine dropper
29. 29.🧺 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 towel (d) a magnet
30. 30.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) turmeric powder (c) a glass of water (d) a sink or a bucket
33. 33.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a magnetic pin holder (d) a drinking straw
34. 34.⚖️ 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) whether the card stays (b) the same card (c) how full the glass is (d) the same glass
35. 35.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.⚖️ 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 keep it the same (b) we measure it (c) we change it
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a balloon (d) a glass of water
38. 38.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed

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