Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 886 · 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.🥛 Which of these works by air pressure? (a) a suction hook (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a magnet (d) a stiff postcard
3. 3.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a suction hook (d) a vacuum cleaner
4. 4.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
5. 5.⚖️ 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) the same card (c) whether the card stays (d) how full the glass is
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a stiff postcard (d) a towel
7. 7.True or false: a vacuum cleaner works by air pressure. (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 towel (c) yeast (d) a sink or a bucket
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) turmeric powder
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) a stiff postcard (d) a glass of water
11. 11.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
13. 13.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a stiff postcard (c) a battery cell (d) a magnet
15. 15.True or false: a bicycle pump works by magnetism. (a) False (b) True
16. 16.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) the card gets wet (d) it looks nicer
17. 17.⚖️ 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) True (b) False
18. 18.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🧺 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 magnet (d) a sink or a bucket
25. 25.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
26. 26.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
27. 27.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) near a plug point (d) on a bed
28. 28.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.🧺 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 towel (d) a mirror
30. 30.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) friction (d) air pressure
31. 31.True or false: a suction hook works by air pressure. (a) True (b) False
32. 32.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) air pushing up (d) a magnet
33. 33.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the glass breaks (c) the water turns to ice (d) the card flies away
34. 34.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) a glass of water (d) a towel
36. 36.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a fridge magnet (d) a medicine dropper
37. 37.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic pin holder (c) a drinking straw (d) a bicycle pump
38. 38.⚖️ 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) False (b) True
39. 39.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) air inside pushes back (d) water is hiding there
40. 40.⚖️ 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

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