Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 870 · 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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a towel (c) a glass of water (d) a sink or a bucket
3. 3.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.True or false: a magnetic chess set works by magnetism. (a) False (b) True
5. 5.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the glass breaks (d) the card stays on
6. 6.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
8. 8.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to cool the glass (d) to grow plants
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a stiff postcard (d) a sink or a bucket
12. 12.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a towel (d) a stiff postcard
17. 17.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.True or false: a drinking straw works by magnetism. (a) True (b) False
19. 19.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) magnetism (d) air pressure
20. 20.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a fridge magnet (d) a suction hook
21. 21.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
22. 22.🥛 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
23. 23.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
25. 25.⚖️ 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
26. 26.🔍 Which is the odd one out? (a) a medicine dropper (b) a compass needle (c) a fridge magnet (d) a magnetic chess set
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) a balloon
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a battery cell (d) a mirror
29. 29.🧺 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) turmeric powder (d) a stiff postcard
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a sink or a bucket (d) a stiff postcard
31. 31.⚖️ 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 change it (b) we measure it (c) we keep it the same
32. 32.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.⚖️ 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) True (b) False
34. 34.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a drinking straw (d) a compass needle
35. 35.True or false: a bicycle pump works by magnetism. (a) True (b) False
36. 36.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a drinking straw (c) a suction hook (d) a bicycle pump
37. 37.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) the straw is magnetic (d) juice likes plastic
38. 38.🔮 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
39. 39.⚖️ 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) whether the card stays (c) the same glass (d) the same card
40. 40.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism

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