Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 586 · 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 same card is the one thing we change. (a) False (b) True
2. 2.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
3. 3.True or false: a magnetic chess set works by magnetism. (a) True (b) False
4. 4.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🛟 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
6. 6.⚖️ 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
7. 7.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a medicine dropper (d) a suction hook
8. 8.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🧺 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 towel (c) a glass of water (d) a battery cell
10. 10.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) air pushing up (d) the cold water
11. 11.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.🔍 Which is the odd one out? (a) a fridge magnet (b) a bicycle pump (c) a compass needle (d) a magnetic chess set
13. 13.⚖️ 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
14. 14.🔍 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 card stays on (c) the glass breaks (d) the card flies away
15. 15.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
16. 16.⚖️ 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 change it (c) we measure it
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a towel (c) a sink or a bucket (d) a stiff postcard
18. 18.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) water is heavier (d) little air left inside
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 kept the same. (a) True (b) False
20. 20.🔮 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
21. 21.⚖️ 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
22. 22.⚖️ 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 way we turn it (c) how full the glass is
23. 23.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a fridge magnet (d) a drinking straw
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) a towel (d) a glass of water
26. 26.🧺 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 stiff postcard (d) a sink or a bucket
27. 27.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a drinking straw (d) a vacuum cleaner
28. 28.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
29. 29.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.⚖️ 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) the same glass (c) the same card (d) how full the glass is
31. 31.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
32. 32.True or false: a fridge magnet works by magnetism. (a) False (b) True
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a stiff postcard (d) a towel
34. 34.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) on a bed (d) over a sink or bucket
35. 35.🧺 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 glass of water (c) a towel (d) yeast
36. 36.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.⚖️ 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 glass
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a magnet (d) a mirror
39. 39.True or false: a drinking straw works by magnetism. (a) False (b) True
40. 40.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) air (d) water

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