Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 224 · 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.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
2. 2.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a stiff postcard (d) a glass of water
6. 6.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a compass needle (c) a bicycle pump (d) a vacuum cleaner
7. 7.True or false: a suction hook works by magnetism. (a) False (b) True
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) a mirror
9. 9.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) air pushes it up (c) the straw is hot (d) juice likes plastic
11. 11.🔍 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
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) how full the glass is (b) the same glass (c) whether the card stays (d) the same card
13. 13.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) it looks nicer (d) water is heavier
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) yeast (c) a sink or a bucket (d) a stiff postcard
15. 15.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
16. 16.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a medicine dropper (c) a bicycle pump (d) a magnetic chess set
17. 17.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a medicine dropper (d) a drinking straw
18. 18.🧺 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 glass of water (d) a balloon
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a balloon
20. 20.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
22. 22.⚖️ 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
23. 23.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a suction hook
24. 24.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
26. 26.⚖️ 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) the same glass (b) whether the card stays (c) how full the glass is
27. 27.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic
29. 29.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a drinking straw (d) a fridge magnet
30. 30.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) air pressure (d) magnetism
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a mirror (d) a balloon
33. 33.🔮 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
34. 34.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
37. 37.True or false: a drinking straw works by air pressure. (a) False (b) True
38. 38.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.True or false: a compass needle works by air pressure. (a) True (b) False
40. 40.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a battery cell (d) a glass of water

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