Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 689 · 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.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
2. 2.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
3. 3.🔍 Which is the odd one out? (a) a medicine dropper (b) a compass needle (c) a bicycle pump (d) a drinking straw
4. 4.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a medicine dropper (c) a magnetic pin holder (d) a compass needle
5. 5.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) a towel (d) a glass of water
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a towel (d) turmeric powder
8. 8.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
9. 9.🔍 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
10. 10.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
11. 11.True or false: a fridge magnet works by air pressure. (a) False (b) True
12. 12.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) the card gets wet (d) water is heavier
13. 13.⚖️ 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 kept the same. (a) False (b) True
14. 14.⚖️ 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) how full the glass is (b) the same glass (c) whether the card stays (d) the way we turn it
15. 15.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.True or false: a magnetic chess set works by air pressure. (a) False (b) True
18. 18.⚖️ 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 what we measure. (a) True (b) False
19. 19.True or false: a medicine dropper works by air pressure. (a) True (b) False
20. 20.🥛 Which of these works by magnetism? (a) a compass needle (b) a suction hook (c) a drinking straw (d) a bicycle pump
21. 21.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to catch any spills (d) to make it rain
23. 23.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
24. 24.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
25. 25.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
26. 26.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
27. 27.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic chess set (c) a suction hook (d) a bicycle pump
29. 29.🧺 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 balloon
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) turmeric powder (c) yeast (d) a battery cell
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) yeast (d) a stiff postcard
33. 33.True or false: a drinking straw works by air pressure. (a) False (b) True
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) False (b) True
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a sink or a bucket (c) a stiff postcard (d) a glass of water
36. 36.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a fridge magnet (d) a vacuum cleaner
37. 37.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) the straw is magnetic (d) juice likes plastic
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
39. 39.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) friction (d) air pressure

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