Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 636 · 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.🔮 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
2. 2.⚖️ 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 card (c) whether the card stays
3. 3.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.⚖️ 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) True (b) False
7. 7.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.True or false: a suction hook works by air pressure. (a) False (b) True
9. 9.True or false: a medicine dropper works by magnetism. (a) False (b) True
10. 10.⚖️ 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 way we turn it (b) the same glass (c) how full the glass is (d) whether the card stays
11. 11.🥛 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
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) the same glass (b) whether the card stays (c) how full the glass is
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a balloon
14. 14.True or false: a drinking straw works by air pressure. (a) False (b) True
15. 15.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
17. 17.⚖️ 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
18. 18.⚖️ 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
19. 19.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.🧺 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 magnet (d) a sink or a bucket
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a mirror (c) a balloon (d) a sink or a bucket
23. 23.🔍 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 glass breaks (c) the card flies away (d) the card stays on
24. 24.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
25. 25.⚖️ 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
26. 26.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a fridge magnet (d) a medicine dropper
27. 27.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a medicine dropper (d) a magnetic pin holder
29. 29.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) the cap is sticky (d) air inside pushes back
31. 31.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
33. 33.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
34. 34.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a drinking straw
35. 35.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) False (b) True
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a mirror (d) a stiff postcard
38. 38.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
39. 39.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a bicycle pump (c) a drinking straw (d) a suction hook
40. 40.⚖️ 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

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