Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 895 · 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 card is kept the same. (a) False (b) True
2. 2.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
3. 3.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
4. 4.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
5. 5.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a suction hook (c) a bicycle pump (d) a vacuum cleaner
6. 6.⚖️ 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 measure it (b) we change it (c) we keep it the same
7. 7.🛟 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
8. 8.True or false: a suction hook works by air pressure. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a magnetic chess set (d) a magnetic pin holder
10. 10.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a battery cell (d) a sink or a bucket
13. 13.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic pin holder (c) a drinking straw (d) a medicine dropper
14. 14.🛟 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
15. 15.⚖️ 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 measure it (b) we change it (c) we keep it the same
16. 16.⚖️ 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) how full the glass is (b) the same glass (c) whether the card stays
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a glass of water (d) a towel
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a magnet (d) a towel
19. 19.⚖️ 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 kept the same. (a) True (b) False
20. 20.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
21. 21.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a medicine dropper
22. 22.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a magnetic pin holder (d) a suction hook
23. 23.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) air (d) water
24. 24.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) the cold water (d) air pushing up
25. 25.⚖️ 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 measure it (c) we keep it the same
26. 26.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a glass of water (d) a towel
27. 27.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) magnetism (d) air pressure
28. 28.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is magnetic (c) juice likes plastic (d) the straw is hot
29. 29.⚖️ 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 card (b) how full the glass is (c) the way we turn it (d) the same glass
30. 30.🧺 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) a mirror
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a glass of water (c) a balloon (d) a battery cell
32. 32.True or false: a compass needle works by air pressure. (a) False (b) True
33. 33.⚖️ 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) the same glass (b) the way we turn it (c) whether the card stays (d) how full the glass is
34. 34.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card stays on (c) the card flies away (d) the water turns to ice
36. 36.⚖️ 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) True (b) False
37. 37.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a fridge magnet (d) a compass needle
38. 38.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🔮 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
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) True (b) False

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