Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 634 · 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.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a glass of water (c) a battery cell (d) a balloon
2. 2.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) the cold water (d) a magnet
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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a sink or a bucket (d) a stiff postcard
5. 5.⚖️ 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 measure it (b) we keep it the same (c) we change it
6. 6.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) the card gets wet (d) it looks nicer
7. 7.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
8. 8.⚖️ 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 measure it (c) we keep it the same
9. 9.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a bicycle pump (c) a medicine dropper (d) a vacuum cleaner
11. 11.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) sand (d) smoke
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a towel (c) a mirror (d) turmeric powder
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
14. 14.⚖️ 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
15. 15.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) over a laptop (d) near a plug point
16. 16.⚖️ 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) False (b) True
17. 17.🔮 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
18. 18.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) juice likes plastic (c) the straw is hot (d) the straw is magnetic
19. 19.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a bicycle pump (d) a magnetic pin holder
20. 20.⚖️ 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 way we turn it (c) how full the glass is (d) the same card
21. 21.⚖️ 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) the way we turn it (c) whether the card stays (d) how full the glass is
22. 22.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) water is hiding there (d) air inside pushes back
24. 24.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a magnetic chess set (d) a magnetic pin holder
25. 25.🛟 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
26. 26.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a bicycle pump (c) a fridge magnet (d) a compass needle
27. 27.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.⚖️ 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 what we measure. (a) True (b) False
29. 29.⚖️ 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
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a mirror (d) a towel
31. 31.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.True or false: a magnetic chess set works by magnetism. (a) True (b) False
34. 34.⚖️ 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 measure it (b) we change it (c) we keep it the same
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a stiff postcard (c) a magnet (d) a mirror
36. 36.True or false: a compass needle works by magnetism. (a) False (b) True
37. 37.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
38. 38.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True

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