Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 950 · 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? True or false: the same glass is what we measure. (a) True (b) False
2. 2.🔍 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 card stays on (c) the water turns to ice (d) the glass breaks
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) water is hiding there (d) the bottle is magnetic
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a mirror
5. 5.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) over a laptop (d) on a bed
6. 6.⚖️ 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 change it (c) we measure it
7. 7.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) air pressure (d) friction
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a sink or a bucket (d) a stiff postcard
10. 10.⚖️ 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) the way we turn it (d) whether the card stays
11. 11.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a glass of water (d) a sink or a bucket
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a balloon (d) a magnet
14. 14.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to grow plants (d) to catch any spills
15. 15.True or false: a suction hook works by magnetism. (a) True (b) False
16. 16.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a sink or a bucket (d) a stiff postcard
18. 18.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) air (d) sand
21. 21.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a drinking straw
22. 22.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.⚖️ 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) True (b) False
26. 26.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) a magnet (d) turmeric powder
28. 28.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.True or false: a compass needle works by magnetism. (a) False (b) True
30. 30.⚖️ 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) the same card (c) how full the glass is
31. 31.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a glass of water (c) a towel (d) a sink or a bucket
34. 34.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) the card gets wet (d) water is heavier
35. 35.⚖️ 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 change it (c) we keep it the same
36. 36.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a bicycle pump
37. 37.⚖️ 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) False (b) True
38. 38.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.⚖️ 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 measure it (c) we keep it the same
40. 40.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a medicine dropper (c) a compass needle (d) a bicycle pump

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