Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 742 · 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 measure it (c) we change it
2. 2.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
3. 3.🥛 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
4. 4.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
5. 5.🧺 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 glass of water (d) a balloon
6. 6.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
7. 7.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is magnetic (d) it is heavier
8. 8.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to make it rain (d) to cool the glass
11. 11.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a suction hook (c) a vacuum cleaner (d) a bicycle pump
12. 12.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a balloon (d) turmeric powder
14. 14.⚖️ 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 glass (c) whether the card stays (d) the way we turn it
15. 15.⚖️ 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 glass (b) how full the glass is (c) the same card (d) whether the card stays
16. 16.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a mirror (d) a glass of water
18. 18.🔍 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 water turns to ice (c) the glass breaks (d) the card stays on
19. 19.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
20. 20.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) water (d) sand
23. 23.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) air pressure (d) magnetism
24. 24.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
25. 25.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🥛 Which of these works by magnetism? (a) a drinking straw (b) a suction hook (c) a compass needle (d) a medicine dropper
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) turmeric powder
28. 28.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
29. 29.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.⚖️ 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
31. 31.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a medicine dropper (d) a vacuum cleaner
32. 32.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.⚖️ 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 the one thing we change. (a) True (b) False
34. 34.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
35. 35.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) the cold water (d) glue on the card
37. 37.True or false: a fridge magnet works by magnetism. (a) True (b) False
38. 38.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.⚖️ 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 change it (c) we keep it the same
40. 40.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) yeast (c) a towel (d) a glass of water

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