Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 554 · 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.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
2. 2.True or false: a magnetic chess set works by air pressure. (a) True (b) False
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) air inside pushes back (d) the bottle is magnetic
4. 4.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a bicycle pump (d) a compass needle
6. 6.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
8. 8.🧺 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 sink or a bucket (d) a magnet
9. 9.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
11. 11.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) on a bed (d) over a sink or bucket
12. 12.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.🧺 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 towel (d) a magnet
14. 14.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a drinking straw (d) a magnetic chess set
15. 15.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a drinking straw (d) a magnetic pin holder
16. 16.True or false: yeast 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? What do we do with “the way we turn it”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a mirror (d) a magnet
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a stiff postcard (d) a towel
20. 20.True or false: a medicine dropper works by air pressure. (a) True (b) False
21. 21.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a magnetic pin holder (d) a medicine dropper
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a glass of water (d) a stiff postcard
23. 23.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
25. 25.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
26. 26.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) air pushing up (d) the cold water
28. 28.True or false: a drinking straw 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 “whether the card stays”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.🧺 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 battery cell
31. 31.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a medicine dropper (d) a fridge magnet
32. 32.🔮 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 catch any spills (d) to grow plants
33. 33.True or false: a compass needle works by magnetism. (a) True (b) False
34. 34.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) air pressure (d) friction
35. 35.True or false: a drinking straw works by magnetism. (a) True (b) False
36. 36.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a compass needle (d) a bicycle pump
37. 37.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a fridge magnet (c) a drinking straw (d) a bicycle pump
40. 40.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed

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