Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 185 · 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.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
2. 2.True or false: a suction hook works by magnetism. (a) False (b) True
3. 3.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) air pressure (c) sunlight (d) friction
4. 4.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a balloon (d) a sink or a bucket
6. 6.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) juice likes plastic (d) the straw is magnetic
8. 8.⚖️ 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 way we turn it
9. 9.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.⚖️ 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 keep it the same (c) we measure it
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) the same glass (b) the way we turn it (c) the same card (d) how full the glass is
12. 12.⚖️ 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 card
13. 13.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a vacuum cleaner (d) a compass needle
14. 14.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a suction hook (d) a magnetic pin holder
15. 15.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
17. 17.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
20. 20.🥛 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
21. 21.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
23. 23.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
24. 24.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
25. 25.True or false: a suction hook works by air pressure. (a) False (b) True
26. 26.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card stays on (c) the card flies away (d) the water turns to ice
27. 27.⚖️ 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
28. 28.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a towel (d) yeast
30. 30.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a battery cell (d) a towel
34. 34.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a compass needle (d) a magnetic pin holder
36. 36.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a magnetic chess set (d) a drinking straw
37. 37.🛟 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
38. 38.🔮 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
39. 39.⚖️ 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 change it (c) we keep it the same
40. 40.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic pin holder (c) a medicine dropper (d) a suction hook

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