Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 304 · 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.⚖️ 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 what we measure. (a) True (b) False
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a towel (c) a stiff postcard (d) a glass of water
3. 3.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a medicine dropper (d) a suction hook
5. 5.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a suction hook
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a magnet (c) a sink or a bucket (d) a towel
7. 7.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
8. 8.True or false: a fridge magnet works by magnetism. (a) True (b) False
9. 9.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a medicine dropper (d) a fridge magnet
10. 10.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
13. 13.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) sand (d) water
14. 14.🧺 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 sink or a bucket (d) a mirror
15. 15.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) the straw is hot (d) air pushes it up
16. 16.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a magnetic pin holder (d) a magnetic chess set
17. 17.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
19. 19.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
20. 20.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
21. 21.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) yeast (c) a magnet (d) a stiff postcard
23. 23.True or false: a magnetic chess set works by air pressure. (a) False (b) True
24. 24.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
26. 26.⚖️ 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) True (b) False
27. 27.⚖️ 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
28. 28.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.🔍 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 glass breaks (d) the card flies away
30. 30.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
31. 31.⚖️ 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) whether the card stays (b) how full the glass is (c) the same card (d) the same glass
32. 32.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) air pushing up (d) the cold water
33. 33.⚖️ 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 change it (b) we keep it the same (c) we measure it
34. 34.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) sunlight (d) air pressure
36. 36.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) water is hiding there (d) the cap is sticky
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
38. 38.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a bicycle pump (c) a suction hook (d) a magnetic pin holder

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