Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 280 · 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? Which of these is kept the same? (a) the same card (b) whether the card stays (c) how full the glass is
2. 2.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
3. 3.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) magnetism (d) air pressure
4. 4.🧺 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 magnet (d) a sink or a bucket
5. 5.True or false: a medicine dropper works by air pressure. (a) True (b) False
6. 6.⚖️ 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
7. 7.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.⚖️ 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
9. 9.⚖️ 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) the way we turn it (b) how full the glass is (c) the same glass (d) the same card
10. 10.🛟 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
11. 11.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.⚖️ 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
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
15. 15.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) air (d) water
17. 17.⚖️ 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 same glass (b) the way we turn it (c) whether the card stays (d) the same card
18. 18.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.True or false: a magnetic chess set works by magnetism. (a) False (b) True
22. 22.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🔮 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 grow plants (d) to cool the glass
24. 24.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
25. 25.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
26. 26.🧺 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 balloon (d) a glass of water
27. 27.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) air inside pushes back (d) the bottle is magnetic
28. 28.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a glass of water (d) a sink or a bucket
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a balloon (c) a magnet (d) yeast
31. 31.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.🔍 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 card flies away (c) the glass breaks (d) the water turns to ice
34. 34.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🥛 Which of these works by air pressure? (a) a suction hook (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) turmeric powder
37. 37.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) a bicycle pump (b) a medicine dropper (c) a vacuum cleaner (d) a fridge magnet
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a battery cell (d) a glass of water
40. 40.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) the card gets wet (d) it looks nicer

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