Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 534 · 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.🧺 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) a sink or a bucket (d) turmeric powder
2. 2.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a battery cell (c) a mirror (d) a balloon
4. 4.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
5. 5.⚖️ 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
6. 6.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
7. 7.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a suction hook (d) a magnetic chess set
9. 9.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
10. 10.🥤 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
11. 11.🔍 Which is the odd one out? (a) a bicycle pump (b) a compass needle (c) a drinking straw (d) a medicine dropper
12. 12.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
13. 13.⚖️ 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) whether the card stays (c) the same card (d) the way we turn it
14. 14.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) the cold water (d) glue on the card
15. 15.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
16. 16.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) it looks nicer (d) little air left inside
19. 19.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
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) whether the card stays (c) how full the glass is (d) the same glass
21. 21.🧺 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 balloon (d) a stiff postcard
22. 22.⚖️ 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 way we turn it (b) how full the glass is (c) whether the card stays
23. 23.⚖️ 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 keep it the same (b) we change it (c) we measure it
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
26. 26.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a magnet (d) a sink or a bucket
28. 28.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🛟 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
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a battery cell (d) a stiff postcard
31. 31.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a fridge magnet (d) a compass needle
32. 32.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a vacuum cleaner (d) a compass needle
33. 33.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a fridge magnet (d) a vacuum cleaner
34. 34.⚖️ 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 change it (c) we keep it the same
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a towel (d) a glass of water
36. 36.True or false: a drinking straw works by magnetism. (a) False (b) True
37. 37.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) friction (c) magnetism (d) sunlight

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