Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 783 · 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.🛟 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
2. 2.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
4. 4.🧺 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 stiff postcard
5. 5.⚖️ 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
6. 6.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) the cold water (d) air pushing up
7. 7.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
8. 8.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
10. 10.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) turmeric powder (c) a glass of water (d) a stiff postcard
12. 12.True or false: a compass needle works by air pressure. (a) False (b) True
13. 13.True or false: a suction hook works by air pressure. (a) True (b) False
14. 14.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.⚖️ 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) False (b) True
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a stiff postcard (d) a towel
17. 17.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
18. 18.⚖️ 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 card (c) whether the card stays (d) how full the glass is
19. 19.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a drinking straw (d) a medicine dropper
20. 20.⚖️ 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 keep it the same (b) we measure it (c) we change it
21. 21.True or false: a magnetic chess set works by air pressure. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a suction hook (d) a compass needle
23. 23.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a drinking straw (d) a magnetic pin holder
24. 24.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
25. 25.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
26. 26.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
27. 27.⚖️ 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 way we turn it
28. 28.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a fridge magnet (d) a suction hook
29. 29.🔮 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
30. 30.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the glass breaks (c) the card flies away (d) the water turns to ice
31. 31.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a sink or a bucket (c) a stiff postcard (d) a towel
32. 32.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
33. 33.⚖️ 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 measure it (b) we keep it the same (c) we change it
34. 34.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
36. 36.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a stiff postcard (c) a towel (d) a glass of water
38. 38.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a magnet (c) a sink or a bucket (d) a glass of water
40. 40.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed

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