Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 43 · 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.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) a glass of water (d) a towel
2. 2.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
4. 4.⚖️ 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
5. 5.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) water is hiding there (d) the cap is sticky
6. 6.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) the straw is hot (d) air pushes it up
8. 8.🧺 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 stiff postcard (c) a glass of water (d) a balloon
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a sink or a bucket (d) a battery cell
11. 11.⚖️ 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 change it (b) we keep it the same (c) we measure it
12. 12.🧺 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
13. 13.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.⚖️ 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
15. 15.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a bicycle pump (d) a compass needle
16. 16.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) smoke (d) water
17. 17.⚖️ 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
18. 18.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) friction (d) air pressure
19. 19.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
20. 20.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a medicine dropper (d) a magnetic pin holder
22. 22.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a medicine dropper (c) a drinking straw (d) a vacuum cleaner
23. 23.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.True or false: a magnet 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? True or false: the way we turn it is the one thing we change. (a) True (b) False
27. 27.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a towel (c) a sink or a bucket (d) a glass of water
29. 29.🧺 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 stiff postcard (d) yeast
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a battery cell (d) a mirror
31. 31.🔍 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 glass breaks (c) the card stays on (d) the water turns to ice
32. 32.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.⚖️ 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) False (b) True
34. 34.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a mirror (d) a balloon
36. 36.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
37. 37.🔍 Which is the odd one out? (a) a medicine dropper (b) a suction hook (c) a drinking straw (d) a compass needle
38. 38.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.⚖️ 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) how full the glass is (d) whether the card stays
40. 40.⚖️ 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

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