Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 234 · 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 is not needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
2. 2.⚖️ 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) True (b) False
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a glass of water (d) a towel
4. 4.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) near a plug point (d) over a laptop
5. 5.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a stiff postcard (d) a balloon
7. 7.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
8. 8.🧺 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 stiff postcard (c) a glass of water (d) a balloon
9. 9.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a suction hook (d) a magnetic pin holder
11. 11.🔍 Which is the odd one out? (a) a fridge magnet (b) a vacuum cleaner (c) a medicine dropper (d) a drinking straw
12. 12.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
13. 13.⚖️ 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) whether the card stays (b) the same card (c) how full the glass is (d) the way we turn it
14. 14.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
15. 15.🛟 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 hotter (d) it is magnetic
16. 16.⚖️ 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) the way we turn it (c) whether the card stays (d) how full the glass is
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a magnet (c) a sink or a bucket (d) a glass of water
18. 18.🔍 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 water turns to ice (c) the card flies away (d) the glass breaks
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 change it (c) we keep it the same
20. 20.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to catch any spills (d) to make it rain
22. 22.⚖️ 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
23. 23.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) a medicine dropper (b) a compass needle (c) a suction hook (d) a bicycle pump
27. 27.⚖️ 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 what we measure. (a) False (b) True
28. 28.True or false: a magnetic chess set works by air pressure. (a) True (b) False
29. 29.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
32. 32.🧺 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 glass of water (d) yeast
33. 33.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) friction (d) air pressure
34. 34.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a magnetic chess set (d) a fridge magnet
35. 35.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.True or false: a bicycle pump works by magnetism. (a) False (b) True
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 keep it the same (b) we change it (c) we measure it
39. 39.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a drinking straw (d) a compass needle
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a mirror (c) turmeric powder (d) a magnet

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