Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 794 · 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.🛟 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
2. 2.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a medicine dropper (d) a fridge magnet
3. 3.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) little air left inside (d) the card gets wet
5. 5.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
6. 6.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) the straw is magnetic (d) air pushes it up
7. 7.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
8. 8.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) air pressure (c) friction (d) sunlight
11. 11.⚖️ 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) how full the glass is (b) the same glass (c) the same card (d) whether the card stays
12. 12.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) sand (d) water
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) how full the glass is (b) the same card (c) whether the card stays (d) the same glass
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a stiff postcard (c) a towel (d) a sink or a bucket
15. 15.⚖️ 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
16. 16.🧺 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 balloon (d) a towel
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a glass of water (d) a stiff postcard
18. 18.🧺 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 magnet
19. 19.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a mirror (d) a stiff postcard
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 keep it the same (c) we change it
23. 23.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
25. 25.⚖️ 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
26. 26.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to cool the glass (d) to catch any spills
27. 27.🧺 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 sink or a bucket (d) turmeric powder
28. 28.🥛 Which of these works by air pressure? (a) a suction hook (b) a compass needle (c) a fridge magnet (d) a magnetic chess set
29. 29.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a drinking straw (d) a fridge magnet
30. 30.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a bicycle pump (c) a vacuum cleaner (d) a drinking straw
31. 31.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a vacuum cleaner (c) a drinking straw (d) a fridge magnet
32. 32.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a magnet (d) a towel
34. 34.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.True or false: a bicycle pump works by magnetism. (a) True (b) False
37. 37.True or false: a suction hook works by air pressure. (a) True (b) False
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) a balloon (d) a battery cell
39. 39.🥛 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
40. 40.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed

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