Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 855 · 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 sink or a bucket (b) a glass of water (c) a mirror (d) a stiff postcard
2. 2.🧺 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) yeast (d) a glass of water
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 heavier (d) it is hotter
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) False (b) True
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) on a bed (d) near a plug point
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a mirror
9. 9.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.⚖️ 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 change it (b) we measure it (c) we keep it the same
11. 11.🔍 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 card stays on (c) the glass breaks (d) the water turns to ice
12. 12.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a battery cell (d) a sink or a bucket
14. 14.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a sink or a bucket (c) a towel (d) a glass of water
16. 16.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a vacuum cleaner (d) a drinking straw
17. 17.⚖️ 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 kept the same. (a) True (b) False
18. 18.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.⚖️ 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 the one thing we change. (a) True (b) False
20. 20.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) air inside pushes back (d) the bottle is magnetic
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) whether the card stays (b) the same card (c) the way we turn it (d) how full the glass is
22. 22.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand
23. 23.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a compass needle (d) a drinking straw
24. 24.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.📘 Air presses on everything around us. What is this push called? (a) friction (b) air pressure (c) magnetism (d) sunlight
26. 26.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a medicine dropper (d) a suction hook
27. 27.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) air pushing up (d) a magnet
28. 28.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
29. 29.⚖️ 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) False (b) True
30. 30.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
31. 31.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
33. 33.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a magnet (d) turmeric powder
36. 36.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a magnetic pin holder (d) a medicine dropper
38. 38.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.⚖️ 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
40. 40.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a vacuum cleaner (c) a bicycle pump (d) a suction hook

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