Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 772 · 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 works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a compass needle (d) a drinking straw
2. 2.🥤 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
3. 3.⚖️ 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
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a balloon (d) a stiff postcard
6. 6.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) water is heavier (d) little air left inside
7. 7.⚖️ 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
8. 8.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🧺 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) turmeric powder (d) a towel
10. 10.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a vacuum cleaner
11. 11.⚖️ 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
12. 12.⚖️ 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
13. 13.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
14. 14.⚖️ 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 measure it (b) we keep it the same (c) we change it
15. 15.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
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) how full the glass is (b) the same glass (c) whether the card stays
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) smoke (d) water
18. 18.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
20. 20.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic chess set (c) a drinking straw (d) a bicycle pump
21. 21.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to catch any spills (d) to cool the glass
24. 24.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic pin holder (c) a bicycle pump (d) a drinking straw
25. 25.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a suction hook (d) a compass needle
26. 26.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a magnet (c) a mirror (d) a towel
28. 28.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card stays on (c) the card flies away (d) the glass breaks
29. 29.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
30. 30.🔮 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) the bottle is magnetic (d) water is hiding there
31. 31.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
32. 32.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.True or false: a suction hook works by air pressure. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
36. 36.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a medicine dropper (d) a suction hook
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) a battery cell
38. 38.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.⚖️ 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 change it (b) we measure it (c) we keep it the same
40. 40.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a vacuum cleaner

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