Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 694 · 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 bicycle pump works by air pressure. (a) False (b) True
2. 2.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
4. 4.⚖️ 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
5. 5.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) on a bed (d) near a plug point
7. 7.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
8. 8.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a battery cell (d) a glass of water
11. 11.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) smoke (d) water
12. 12.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a suction hook
13. 13.🥛 Which of these works by magnetism? (a) a drinking straw (b) a suction hook (c) a magnetic pin holder (d) a medicine dropper
14. 14.⚖️ 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
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) turmeric powder (d) a magnet
16. 16.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a drinking straw (d) a magnetic chess set
18. 18.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) water is hiding there (d) air inside pushes back
19. 19.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is magnetic (c) the straw is hot (d) juice likes plastic
22. 22.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a fridge magnet (d) a vacuum cleaner
23. 23.⚖️ 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) the same card (c) whether the card stays (d) the same glass
24. 24.⚖️ 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
25. 25.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) it looks nicer (d) the card gets wet
26. 26.🥛 Which of these works by air pressure? (a) a suction hook (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
27. 27.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.🧺 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 balloon (c) a glass of water (d) a stiff postcard
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a stiff postcard (d) a glass of water
30. 30.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.True or false: a compass needle works by air pressure. (a) True (b) False
32. 32.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the water turns to ice (d) the card stays on
34. 34.⚖️ 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) whether the card stays (b) the same card (c) how full the glass is
35. 35.⚖️ 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) how full the glass is (c) whether the card stays (d) the same glass
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
37. 37.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a sink or a bucket (d) a battery cell
40. 40.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed

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