Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 615 · 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.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) glue on the card (d) air pushing up
2. 2.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
4. 4.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a balloon (d) yeast
5. 5.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card stays on (d) the card flies away
6. 6.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic chess set (c) a medicine dropper (d) a drinking straw
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) a glass of water (d) turmeric powder
8. 8.True or false: a compass needle works by magnetism. (a) True (b) False
9. 9.⚖️ 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) how full the glass is (b) the same glass (c) whether the card stays (d) the same card
10. 10.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
11. 11.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
12. 12.⚖️ 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
13. 13.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
15. 15.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
16. 16.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a suction hook (d) a bicycle pump
17. 17.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a fridge magnet (d) a drinking straw
18. 18.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) turmeric powder (d) a stiff postcard
20. 20.⚖️ 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) the same card (b) whether the card stays (c) how full the glass is
21. 21.⚖️ 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
22. 22.🔮 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
23. 23.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a bicycle pump (d) a compass needle
24. 24.⚖️ 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
25. 25.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
26. 26.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a drinking straw (c) a medicine dropper (d) a bicycle pump
27. 27.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
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) False (b) True
30. 30.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
31. 31.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
32. 32.⚖️ 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) the same glass (d) the way we turn it
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a balloon (d) a stiff postcard
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) yeast (d) a battery cell
35. 35.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a medicine dropper (d) a drinking straw
36. 36.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
37. 37.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
39. 39.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a bicycle pump (d) a medicine dropper

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