Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 747 · 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.True or false: a bicycle pump works by air pressure. (a) False (b) True
2. 2.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card flies away (d) the card stays on
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 same card”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a compass needle (d) a fridge magnet
5. 5.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
6. 6.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a drinking straw
8. 8.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) the straw is hot (d) air pushes it up
9. 9.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
11. 11.🥛 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
12. 12.⚖️ 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) True (b) False
13. 13.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a balloon (c) a sink or a bucket (d) yeast
15. 15.⚖️ 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 way we turn it (c) whether the card stays
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
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 mirror (d) a towel
18. 18.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) it looks nicer (d) water is heavier
19. 19.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) air pressure (c) magnetism (d) friction
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a magnet (d) a stiff postcard
21. 21.⚖️ 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 keep it the same (b) we measure it (c) we change it
22. 22.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a bicycle pump (d) a magnetic pin holder
23. 23.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a drinking straw (d) a magnetic chess set
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 glass of water (c) a magnet (d) a towel
25. 25.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
26. 26.🧺 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 stiff postcard (d) a battery cell
27. 27.⚖️ 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 glass (b) whether the card stays (c) the same card (d) the way we turn it
28. 28.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a drinking straw (d) a bicycle pump
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a sink or a bucket (d) a towel
30. 30.⚖️ 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 keep it the same (b) we change it (c) we measure it
31. 31.🛟 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
32. 32.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a battery cell (d) a glass of water
34. 34.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
35. 35.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a magnetic chess set (c) a compass needle (d) a magnetic pin holder
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a balloon (d) a stiff postcard
38. 38.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
40. 40.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed

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