Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 925 · 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 stiff postcard (b) a sink or a bucket (c) yeast (d) a glass of water
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) whether the card stays (b) how full the glass is (c) the way we turn it
3. 3.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
4. 4.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🔮 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) water is hiding there (d) the bottle is magnetic
6. 6.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
7. 7.🧺 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 glass of water (c) a magnet (d) a stiff postcard
8. 8.🥛 Which of these works by air pressure? (a) a suction hook (b) a fridge magnet (c) a magnetic chess set (d) a magnetic pin holder
9. 9.True or false: a magnetic chess set works by magnetism. (a) True (b) False
10. 10.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to cool the glass (d) to grow plants
11. 11.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a bicycle pump (d) a drinking straw
12. 12.⚖️ 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
13. 13.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
14. 14.True or false: a fridge magnet works by air pressure. (a) True (b) False
15. 15.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a drinking straw (d) a compass needle
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
17. 17.🧺 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 towel (d) a mirror
18. 18.🔍 Which is the odd one out? (a) a drinking straw (b) a vacuum cleaner (c) a magnetic chess set (d) a suction hook
19. 19.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a compass needle (d) a drinking straw
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) how full the glass is (b) the way we turn it (c) the same glass (d) whether the card stays
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a stiff postcard (d) yeast
22. 22.True or false: a drinking straw works by air pressure. (a) False (b) True
23. 23.⚖️ 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
24. 24.🥛 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
25. 25.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🛟 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
27. 27.🔍 Which is the odd one out? (a) a suction hook (b) a compass needle (c) a magnetic chess set (d) a fridge magnet
28. 28.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a vacuum cleaner (c) a fridge magnet (d) a compass needle
30. 30.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) turmeric powder (c) a glass of water (d) a battery cell
32. 32.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a compass needle (d) a drinking straw
33. 33.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a sink or a bucket (d) a stiff postcard
35. 35.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🧺 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 battery cell (d) a glass of water
37. 37.🥛 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
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a balloon (d) a sink or a bucket
40. 40.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a medicine dropper (c) a magnetic chess set (d) a magnetic pin holder

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