Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 732 · 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.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a bicycle pump (d) a compass needle
3. 3.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.⚖️ 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
5. 5.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
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 glass of water (d) a stiff postcard
7. 7.⚖️ 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) how full the glass is (c) the way we turn it (d) the same glass
8. 8.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) air pressure (d) friction
9. 9.🧺 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 balloon (d) a stiff postcard
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a drinking straw (d) a bicycle pump
14. 14.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic chess set (c) a compass needle (d) a magnetic pin holder
16. 16.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a medicine dropper
17. 17.True or false: a glass of water is needed for the card-on-a-glass trick. (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 glass”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🔮 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) the bottle is magnetic (d) air inside pushes back
20. 20.🧺 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 magnet (d) a towel
21. 21.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🧺 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) yeast
23. 23.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a battery cell
25. 25.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a vacuum cleaner (d) a magnetic chess set
26. 26.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.🛟 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
28. 28.⚖️ 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) whether the card stays (b) the same card (c) the same glass (d) the way we turn it
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) turmeric powder (c) a glass of water (d) a mirror
30. 30.True or false: a suction hook works by magnetism. (a) True (b) False
31. 31.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) yeast (c) a towel (d) a stiff postcard
32. 32.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
33. 33.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.🥛 Which of these works by air pressure? (a) a compass needle (b) a medicine dropper (c) a magnetic chess set (d) a magnetic pin holder
35. 35.⚖️ 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
36. 36.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
38. 38.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
39. 39.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
40. 40.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) a magnet (d) glue on the card

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