Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 239 · 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.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a sheet of white paper (c) a clear glass of water (d) bright sunlight
2. 2.💧 Which of these is freezing? (a) a puddle drying up (b) drops on a cold glass (c) water becoming ice (d) wet clothes drying
3. 3.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it does not fall (c) so it gets hot (d) so the Sun moves
4. 4.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) it goes faster (c) more friction, less far (d) less friction
5. 5.⚖️ 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 change it (b) we measure it (c) we keep it the same
6. 6.💧 Which of these does not let water climb? (a) a strip of cloth (b) a sugar cube (c) a steel spoon (d) a cotton thread
7. 7.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it through glass (c) look at it in a mirror (d) never look at the Sun
8. 8.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.💧 Which of these is freezing? (a) a misty bathroom mirror (b) wet hair drying (c) wet clothes drying (d) making ice lollies
10. 10.🧺 Do we need a balloon for the density tower? (a) not needed (b) needed
11. 11.🚢 Why can a heavy steel ship float on the sea? (a) it has a magnet (b) steel is very light (c) its hollow shape (d) sea water is warm
12. 12.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.🧺 Do we need cotton wool for the dissolving test? (a) not needed (b) needed
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the kind of flower (b) time for colour to show (c) the length of the stem (d) the room it stands in
15. 15.True or false: turmeric powder is not needed for the float-or-sink test. (a) True (b) False
16. 16.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) the same window (c) brightness of rainbow
17. 17.🔍 Which layer is on top in the honey-water-oil tower? (a) honey (b) coloured water (c) the spoon (d) cooking oil
18. 18.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is kept the same. (a) True (b) False
19. 19.🧺 Which of these is needed for the balloon rocket? (a) yeast (b) a magnet (c) two chairs (d) turmeric powder
20. 20.🧺 Which of these is needed for the float-or-sink test? (a) yeast (b) small test objects (c) a balloon (d) a mirror
21. 21.True or false: food colour dissolves in water. (a) False (b) True
22. 22.🍯 Which of these is denser than water? (a) an ice cube (b) a coin (c) cooking oil (d) air
23. 23.🚁 Which of these falls fast through the air? (a) a toy parachute (b) a steel spoon (c) an open sheet of paper (d) a feather
24. 24.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
25. 25.True or false: a piece of thermocol sinks in water. (a) True (b) False
26. 26.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the order of the layers (b) the same glass (c) the same three liquids (d) the order of pouring
27. 27.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a suction hook (d) a magnetic pin holder
28. 28.True or false: bright sunlight is needed for the water rainbow. (a) False (b) True
29. 29.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the amount of clay (b) the shape of the clay (c) the kind of clay (d) whether it floats
30. 30.💧 Which of these is evaporation? (a) snow turning to water (b) drops on a cold glass (c) sweat drying on skin (d) water becoming ice
31. 31.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a battery cell (b) a strip of paper (c) a pencil (d) a paper clip
32. 32.🧺 Do we need a magnet for the density tower? (a) needed (b) not needed
33. 33.🥄 Does sugar left unstirred dissolve faster or slower? (a) slower (b) faster
34. 34.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the person dropping (b) the length of the blades (c) time to reach the floor
35. 35.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
36. 36.True or false: a stone falls slowly through the air. (a) False (b) True
37. 37.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) nothing ever happens (c) it turns to plastic (d) colour climbs up it
38. 38.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) backward (b) it stays still (c) forward (d) straight down
39. 39.True or false: an ice cube is less dense than water. (a) True (b) False
40. 40.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) the same straw (b) distance it travels (c) how big we blow it

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