Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 445 · 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.🧺 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) yeast (d) a towel
2. 2.🛟 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
3. 3.True or false: a bicycle pump works by air pressure. (a) False (b) True
4. 4.True or false: a compass needle works by magnetism. (a) True (b) False
5. 5.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) magnetism (c) sunlight (d) friction
6. 6.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.⚖️ 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
8. 8.⚖️ 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 change it (b) we keep it the same (c) we measure it
9. 9.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to cool the glass (d) to catch any spills
11. 11.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a magnetic pin holder (d) a drinking straw
12. 12.⚖️ 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) whether the card stays (c) the way we turn it (d) how full the glass is
13. 13.⚖️ 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) how full the glass is (c) the same glass
14. 14.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a glass of water (c) a towel (d) a stiff postcard
17. 17.⚖️ 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 keep it the same (b) we change it (c) we measure it
18. 18.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
19. 19.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a vacuum cleaner (d) a magnetic chess set
20. 20.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a bicycle pump (c) a suction hook (d) a drinking straw
21. 21.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a vacuum cleaner
23. 23.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🔍 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 water turns to ice (c) the card flies away (d) the glass breaks
25. 25.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🧺 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 stiff postcard (d) turmeric powder
27. 27.🧺 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) a magnet
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a towel (d) a balloon
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a battery cell (c) a glass of water (d) a towel
30. 30.🧺 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 balloon (d) a stiff postcard
31. 31.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a drinking straw
32. 32.⚖️ 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
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a battery cell (d) a towel
34. 34.⚖️ 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) False (b) True
35. 35.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.⚖️ 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
37. 37.🥤 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
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a stiff postcard (c) a magnet (d) a battery cell
39. 39.🥛 Which of these works by magnetism? (a) a drinking straw (b) a compass needle (c) a vacuum cleaner (d) a suction hook
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a glass of water (d) a magnet

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