Air Pressure Experiment Worksheet

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

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