Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 332 · 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 sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
2. 2.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a mirror (d) yeast
4. 4.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the glass breaks (c) the card stays on (d) the water turns to ice
6. 6.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
7. 7.🛟 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
8. 8.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
9. 9.⚖️ 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 glass (b) whether the card stays (c) how full the glass is (d) the same card
10. 10.🔮 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
11. 11.True or false: a medicine dropper works by air pressure. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a drinking straw
13. 13.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🛟 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
15. 15.🧺 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) turmeric powder (d) a glass of water
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a balloon (d) a stiff postcard
17. 17.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a compass needle (d) a medicine dropper
18. 18.⚖️ 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) the way we turn it (b) whether the card stays (c) how full the glass is
19. 19.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a towel (d) a stiff postcard
21. 21.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) friction (d) air pressure
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a battery cell (d) a towel
23. 23.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
24. 24.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a vacuum cleaner (c) a magnetic pin holder (d) a magnetic chess set
25. 25.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) the card gets wet (d) little air left inside
26. 26.True or false: a magnetic chess set works by air pressure. (a) True (b) False
27. 27.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a bicycle pump (d) a magnetic pin holder
29. 29.🥛 Which of these works by magnetism? (a) a compass needle (b) a medicine dropper (c) a bicycle pump (d) a vacuum cleaner
30. 30.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a medicine dropper
32. 32.⚖️ 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
33. 33.🥛 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
34. 34.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
35. 35.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
36. 36.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.🧺 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) turmeric powder (d) a stiff postcard

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