Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 550 · 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.⚖️ 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) False (b) True
2. 2.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
4. 4.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
5. 5.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
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 the one thing we change. (a) True (b) False
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) the same card (b) the same glass (c) whether the card stays (d) how full the glass is
8. 8.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) the cold water (d) air pushing up
9. 9.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the glass breaks (c) the water turns to ice (d) the card stays on
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a magnet (d) yeast
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) how full the glass is (b) the same glass (c) whether the card stays
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
14. 14.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
15. 15.⚖️ 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
16. 16.🔮 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
17. 17.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a medicine dropper (d) a vacuum cleaner
18. 18.⚖️ 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 same card (b) whether the card stays (c) how full the glass is (d) the same glass
19. 19.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
20. 20.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🧺 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
24. 24.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a suction hook (d) a drinking straw
26. 26.🧺 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 towel (c) a balloon (d) a glass of water
27. 27.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
28. 28.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
29. 29.⚖️ 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 change it (c) we measure it
30. 30.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
32. 32.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
33. 33.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
34. 34.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
35. 35.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to grow plants (d) to catch any spills
36. 36.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a fridge magnet (c) a vacuum cleaner (d) a suction hook
37. 37.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) friction (d) air pressure
38. 38.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
39. 39.⚖️ 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 the one thing we change. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a medicine dropper (d) a magnetic chess set

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