Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 275 · 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.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) table salt (d) baking soda
3. 3.⚖️ 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 keep it the same (b) we measure it (c) we change it
4. 4.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we change it (b) we keep it the same (c) we measure it
6. 6.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) petals are magnetic (c) petals lose water to air (d) the stem is hot
7. 7.🥄 Why does sugar dissolve faster in warm water? (a) particles move faster (b) cold water is wet (c) sugar likes the dark (d) warm water is thicker
8. 8.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it sank as sand (b) it became air (c) it spread in the water (d) it vanished for ever
10. 10.🍯 Which of these is denser than water? (a) honey (b) an ice cube (c) air (d) cooking oil
11. 11.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) on top of the oil (b) in the honey layer (c) in the water layer (d) under the honey
12. 12.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) whether it floats (c) the amount of clay
13. 13.🧺 Which of these is needed for the density tower? (a) yeast (b) honey (c) a balloon (d) turmeric powder
14. 14.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a magnetic pin holder (d) a suction hook
15. 15.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a magnet (c) a balloon (d) sticky tape
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 drop height (b) time to reach the floor (c) the length of the blades (d) the paper clip
17. 17.💧 In the covered bowl, where does the water vapour come from? (a) water warmed by the Sun (b) the cling film (c) the bowl itself (d) the air outside
18. 18.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it can pop loudly (c) it gets too heavy (d) it changes colour
19. 19.🧺 Do we need a long string for the balloon rocket? (a) needed (b) not needed
20. 20.⚖️ 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 measure it (c) we keep it the same
21. 21.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it sinks at once (c) it turns to plastic (d) colour climbs up it
22. 22.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
23. 23.🚢 Why can a heavy steel ship float on the sea? (a) its hollow shape (b) sea water is warm (c) it has a magnet (d) steel is very light
24. 24.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they all turn green (c) they turn two colours (d) they fall off at once
25. 25.🔍 How can you get the salt back from salty water? (a) add more water (b) stir it more (c) keep it in a fridge (d) let the water evaporate
26. 26.True or false: table salt dissolves in water. (a) False (b) True
27. 27.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) turmeric powder (b) a pencil (c) a paper clip (d) a ruler
28. 28.True or false: chalk powder does not dissolve in water. (a) True (b) False
29. 29.True or false: a rubber eraser does not let water climb. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) drops on a cold glass (b) dew on morning grass (c) wet clothes drying (d) a misty bathroom mirror
31. 31.🍯 Is cooking oil denser or less dense than water? (a) less dense than water (b) denser than water
32. 32.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sheet of white paper (c) a magnet (d) a sunny window
34. 34.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the drop height (b) time to reach the floor (c) the kind of paper (d) the person dropping
35. 35.True or false: a magnet is needed for the coloured flower experiment. (a) False (b) True
36. 36.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar in icy water (c) sugar in warm water (d) sugar stirred well
37. 37.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a steel spoon (c) a glass marble (d) a strip of cloth
38. 38.⚖️ 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 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 kept the same? (a) the order of pouring (b) how much of each liquid (c) the order of the layers
40. 40.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) False (b) True

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