Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 168 · 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.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
2. 2.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
3. 3.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a vacuum cleaner (d) a fridge magnet
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
5. 5.⚖️ 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 what we measure. (a) True (b) False
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a towel (d) a magnet
7. 7.🔍 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 water turns to ice (d) the card stays on
8. 8.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) water is heavier (d) the card gets wet
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) yeast (d) a stiff postcard
10. 10.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
11. 11.⚖️ 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) how full the glass is (c) whether the card stays
12. 12.⚖️ 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) False (b) True
13. 13.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
14. 14.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
15. 15.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) over a laptop (d) near a plug point
16. 16.⚖️ 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 keep it the same (c) we measure it
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
18. 18.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
20. 20.⚖️ 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 change it (b) we keep it the same (c) we measure it
21. 21.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a compass needle (d) a magnetic chess set
22. 22.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) turmeric powder (d) a magnet
24. 24.🥛 Which of these works by magnetism? (a) a drinking straw (b) a magnetic chess set (c) a bicycle pump (d) a vacuum cleaner
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a magnet (d) a glass of water
26. 26.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) yeast (d) a towel
28. 28.⚖️ 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) True (b) False
29. 29.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a suction hook (d) a magnetic pin holder
31. 31.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
32. 32.⚖️ 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
33. 33.🧺 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 battery cell (d) a towel
34. 34.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
35. 35.⚖️ 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) the same glass (c) how full the glass is (d) whether the card stays
36. 36.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a drinking straw (d) a fridge magnet
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a towel (d) a glass of water
38. 38.True or false: a sink or a bucket is not 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 “how full the glass is”? (a) we change it (b) we keep it the same (c) we measure it
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a battery cell (d) a mirror

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