Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 781 · 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 suction hook works by magnetism. (a) False (b) True
2. 2.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
3. 3.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) water (c) smoke (d) sand
4. 4.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to catch any spills (d) to cool the glass
7. 7.🔍 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 card stays on (c) the glass breaks (d) the water turns to ice
8. 8.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is the one thing we change. (a) False (b) True
9. 9.True or false: a magnetic chess set works by magnetism. (a) True (b) False
10. 10.⚖️ 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 way we turn it
11. 11.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
15. 15.🧺 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 towel (d) a magnet
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 way we turn it (b) the same glass (c) whether the card stays (d) how full the glass is
17. 17.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🛟 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
19. 19.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is hot (c) the straw is magnetic (d) air pushes it up
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a towel (d) a magnet
21. 21.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a vacuum cleaner (d) a suction hook
22. 22.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) water is heavier (d) little air left inside
23. 23.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a medicine dropper (d) a magnetic pin holder
24. 24.True or false: a compass needle works by air pressure. (a) True (b) False
25. 25.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) sunlight (c) magnetism (d) friction
26. 26.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a fridge magnet (d) a magnetic pin holder
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) True (b) False
28. 28.🥛 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
29. 29.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
30. 30.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
31. 31.True or false: a medicine dropper works by air pressure. (a) True (b) False
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
33. 33.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
34. 34.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
35. 35.True or false: a compass needle works by magnetism. (a) True (b) False
36. 36.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a bicycle pump (d) a compass needle
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a stiff postcard (d) turmeric powder
40. 40.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there

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