Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 605 · 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.🧺 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 towel (d) a sink or a bucket
2. 2.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
3. 3.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
4. 4.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a drinking straw (c) a vacuum cleaner (d) a suction hook
5. 5.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a magnetic chess set (d) a vacuum cleaner
6. 6.⚖️ 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
7. 7.⚖️ 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
8. 8.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.⚖️ 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) False (b) True
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
11. 11.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🧺 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 towel (c) a balloon (d) a glass of water
13. 13.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a compass needle (d) a medicine dropper
14. 14.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
15. 15.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a magnetic pin holder (d) a medicine dropper
16. 16.True or false: a suction hook works by air pressure. (a) False (b) True
17. 17.📘 Air presses on everything around us. What is this push called? (a) friction (b) air pressure (c) sunlight (d) magnetism
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 sink or a bucket (c) a glass of water (d) a mirror
19. 19.True or false: a compass needle works by air pressure. (a) False (b) True
20. 20.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.⚖️ 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) True (b) False
22. 22.⚖️ 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
23. 23.⚖️ 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) whether the card stays (b) how full the glass is (c) the same glass (d) the way we turn it
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) how full the glass is (b) the way we turn it (c) whether the card stays (d) the same card
25. 25.⚖️ 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) whether the card stays (c) the way we turn it
26. 26.🧺 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 battery cell (d) a glass of water
27. 27.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a vacuum cleaner (d) a compass needle
28. 28.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a bicycle pump (d) a magnetic chess set
29. 29.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a medicine dropper (c) a fridge magnet (d) a magnetic chess set
30. 30.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) a glass of water (d) a balloon
32. 32.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🔍 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 card flies away (c) the glass breaks (d) the water turns to ice
34. 34.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🔮 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) the bottle is magnetic (d) water is hiding there
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
37. 37.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) little air left inside (d) water is heavier
38. 38.True or false: yeast 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 “the way we turn it”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure

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