Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 142 · 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.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) turmeric powder (d) a towel
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) yeast (c) a stiff postcard (d) turmeric powder
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
5. 5.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic chess set (c) a compass needle (d) a magnetic pin holder
7. 7.True or false: a drinking straw works by magnetism. (a) False (b) True
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 card”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a vacuum cleaner (d) a drinking straw
10. 10.⚖️ 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
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a glass of water (d) a stiff postcard
12. 12.True or false: a suction hook works by magnetism. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a medicine dropper (d) a magnetic chess set
14. 14.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is hot (c) the straw is magnetic (d) air pushes it up
15. 15.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic chess set (c) a compass needle (d) a magnetic pin holder
17. 17.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) the cold water (d) a magnet
18. 18.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand
20. 20.⚖️ 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 way we turn it (b) how full the glass is (c) the same glass (d) whether the card stays
21. 21.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
22. 22.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) yeast (c) turmeric powder (d) a mirror
24. 24.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) little air left inside (d) water is heavier
25. 25.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a fridge magnet (d) a magnetic pin holder
27. 27.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🧺 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 glass of water (c) a towel (d) a battery cell
29. 29.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a bicycle pump (c) a medicine dropper (d) a suction hook
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a sink or a bucket (c) a glass of water (d) a stiff postcard
31. 31.🧺 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 stiff postcard (d) turmeric powder
32. 32.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to grow plants (d) to cool the glass
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a battery cell (d) a sink or a bucket
34. 34.🧺 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 glass of water (d) a mirror
35. 35.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) 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 measure it (b) we keep it the same (c) we change it
37. 37.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
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) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
39. 39.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) over a laptop (d) near a plug point

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