Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 690 · 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 mirror (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
2. 2.🛟 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
3. 3.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
4. 4.⚖️ 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 way we turn it (c) how full the glass is (d) whether the card stays
5. 5.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a magnetic pin holder (d) a vacuum cleaner
6. 6.⚖️ 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
7. 7.🔮 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) the cap is sticky (d) water is hiding there
8. 8.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
9. 9.True or false: a fridge magnet works by magnetism. (a) True (b) False
10. 10.🧺 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 battery cell (c) a glass of water (d) a towel
11. 11.⚖️ 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 measure it (c) we keep it the same
12. 12.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
13. 13.⚖️ 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) whether the card stays (b) how full the glass is (c) the same glass (d) the same card
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) turmeric powder (c) a battery cell (d) a magnet
15. 15.True or false: a bicycle pump works by air pressure. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a drinking straw
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) turmeric powder
18. 18.🥛 Which of these works by air pressure? (a) a compass needle (b) a vacuum cleaner (c) a magnetic pin holder (d) a fridge magnet
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
20. 20.🧺 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 towel (d) a magnet
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) turmeric powder (c) a mirror (d) a magnet
22. 22.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) little air left inside (d) water is heavier
24. 24.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
25. 25.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the glass breaks (c) the card stays on (d) the water turns to ice
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) True (b) False
27. 27.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) yeast (d) a towel
29. 29.⚖️ 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 keep it the same (b) we measure it (c) we change it
30. 30.⚖️ 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
31. 31.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) air pressure (c) friction (d) magnetism
34. 34.⚖️ 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) True (b) False
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a magnet (d) a towel
36. 36.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) juice likes plastic (d) air pushes it up
37. 37.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
38. 38.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True

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