Air Pressure Experiment Worksheet

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

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