Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 23 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — density, dissolving, capillary action, light bending, air pressure, push-back, air resistance or condensation. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.True or false: sugar stirred well dissolves slower. (a) True (b) False
2. 2.🧺 Do we need a spoon for the density tower? (a) not needed (b) needed
3. 3.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) how many drops form (b) sun or shade (c) the cling film cover
4. 4.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
5. 5.True or false: sweat drying on skin is evaporation. (a) True (b) False
6. 6.⚖️ 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
7. 7.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
8. 8.True or false: an ice cube is less dense than water. (a) False (b) True
9. 9.🧺 Do we need yeast for the float-or-sink test? (a) needed (b) not needed
10. 10.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is what we measure. (a) True (b) False
11. 11.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) never look at the Sun (c) stare at the Sun (d) look at it through glass
12. 12.🚁 Dropped from a raised hand, does a crumpled paper ball fall slowly or fast? (a) falls slowly (b) falls fast
13. 13.🔍 Which is the odd one out? (a) a metal key (b) an ice-cream stick (c) a feather (d) a piece of thermocol
14. 14.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a vacuum cleaner (c) a magnetic pin holder (d) a compass needle
15. 15.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) food colour (c) a magnet (d) a few hours of waiting
16. 16.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the person dropping (b) the length of the blades (c) the paper clip (d) the kind of paper
17. 17.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same window (b) the same glass (c) the time of day (d) brightness of rainbow
18. 18.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
19. 19.🛟 Who should trim the flower stem? (a) a pet (b) a toddler (c) anyone, without looking (d) a grown-up
20. 20.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a tall clear glass (c) a balloon (d) a spoon
21. 21.True or false: honey is needed for the density tower. (a) False (b) True
22. 22.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same tape (b) how big we blow it (c) the same string (d) distance it travels
23. 23.True or false: a balloon is needed for the water rainbow. (a) True (b) False
24. 24.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the kind of clay (b) the amount of clay (c) the shape of the clay (d) whether it floats
25. 25.🛟 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
26. 26.True or false: water with food colour is needed for the density tower. (a) False (b) True
27. 27.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) at the very bottom (b) in the water layer (c) in the oil layer (d) on top of the oil
28. 28.🔍 Which is the odd one out? (a) a medicine dropper (b) a compass needle (c) a vacuum cleaner (d) a drinking straw
29. 29.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.True or false: baking soda does not dissolve in water. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) an empty capped bottle (b) a pebble (c) a glass marble (d) a ball of clay
32. 32.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the water turns solid (b) the sugar turns to salt (c) some stays undissolved (d) all of it dissolves
33. 33.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) a paper cutter (c) safety scissors (d) sharp kitchen shears
34. 34.🔍 Which is the odd one out? (a) drops under a pot lid (b) a pond icing over (c) a misty bathroom mirror (d) drops on a cold glass
35. 35.True or false: cold water is not needed for the dissolving test. (a) False (b) True
36. 36.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is what we measure. (a) False (b) True
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) turmeric powder (d) yeast
38. 38.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of the layers (b) the order of pouring (c) the same glass (d) the same three liquids
40. 40.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) run around the tub (c) play near a deep pond (d) wipe up spills at once

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