Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 336 · 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? What do we do with “how full the glass is”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
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.📘 Air presses on everything around us. What is this push called? (a) friction (b) air pressure (c) magnetism (d) sunlight
5. 5.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🧺 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 balloon (d) a stiff postcard
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a glass of water (d) a battery cell
8. 8.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
9. 9.⚖️ 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) how full the glass is
10. 10.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
11. 11.🥛 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
12. 12.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
14. 14.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
15. 15.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a medicine dropper
16. 16.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) juice likes plastic (d) air pushes it up
17. 17.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a drinking straw (d) a magnetic chess set
19. 19.🔮 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 cool the glass (d) to grow plants
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) a balloon (d) a battery cell
21. 21.⚖️ 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 way we turn it
22. 22.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
23. 23.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a stiff postcard (d) a sink or a bucket
24. 24.🧺 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 towel (d) a glass of water
25. 25.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a suction hook (d) a bicycle pump
26. 26.⚖️ 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) True (b) False
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
29. 29.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) over a sink or bucket (d) on a bed
31. 31.True or false: a suction hook works by air pressure. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a medicine dropper (b) a compass needle (c) a magnetic pin holder (d) a magnetic chess set
33. 33.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.⚖️ 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
35. 35.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a drinking straw (c) a magnetic chess set (d) a magnetic pin holder
36. 36.⚖️ 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 keep it the same (c) we measure it
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) a sink or a bucket (d) a towel
38. 38.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic chess set (d) a suction hook
39. 39.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.⚖️ 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

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