Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 734 · 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? Which of these is what we measure? (a) how full the glass is (b) the same glass (c) the way we turn it (d) whether the card stays
2. 2.🧺 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
3. 3.🧺 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 balloon (d) a stiff postcard
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a suction hook (d) a fridge magnet
8. 8.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
9. 9.🧺 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
10. 10.🧺 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 towel
11. 11.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
13. 13.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) water is heavier (d) it looks nicer
14. 14.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
15. 15.🔍 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
16. 16.⚖️ 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
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a battery cell (d) a sink or a bucket
19. 19.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
20. 20.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
22. 22.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
23. 23.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a glass of water (c) a towel (d) a sink or a bucket
24. 24.⚖️ 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 way we turn it (b) the same card (c) whether the card stays (d) how full the glass is
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 way we turn it”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) a mirror
27. 27.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a magnetic chess set (d) a fridge magnet
29. 29.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a compass needle (c) a magnetic chess set (d) a magnetic pin holder
31. 31.⚖️ 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 card (b) whether the card stays (c) how full the glass is
32. 32.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) yeast (d) a balloon
34. 34.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
35. 35.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) glue on the card (d) air pushing up
38. 38.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a suction hook
40. 40.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False

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