Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 296 · 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.🔍 Which is the odd one out? (a) very salty water (b) a glass marble (c) cooking oil (d) a coin
2. 2.💧 Which change is this: a puddle drying up? (a) evaporation (b) condensation (c) melting (d) freezing
3. 3.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they turn two colours (b) they all turn green (c) they stay white (d) they fall off at once
4. 4.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is the one thing we change. (a) True (b) False
5. 5.⚖️ 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 tub of water (c) the shape of the clay (d) the amount of clay
6. 6.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the water temperature (b) time to dissolve (c) the amount of water
7. 7.🔍 Which is the odd one out? (a) glucose powder (b) chalk powder (c) sawdust (d) small pebbles
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a balloon (d) a stiff postcard
9. 9.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar stirred well (c) a big sugar cube (d) sugar in warm water
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.True or false: a sunny window is not needed for the water rainbow. (a) False (b) True
12. 12.🧺 Which of these is not needed for the density tower? (a) a battery cell (b) water with food colour (c) honey (d) a spoon
13. 13.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True
14. 14.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
15. 15.🧺 Do we need a long string for the balloon rocket? (a) not needed (b) needed
16. 16.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🔮 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) all of it dissolves (d) some stays undissolved
18. 18.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a results table (c) a tub of water (d) yeast
19. 19.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: how many drops form is what we measure. (a) False (b) True
20. 20.🌈 How many colours do we name in a rainbow (VIBGYOR)?
21. 21.📘 What is water vapour? (a) water as a gas (b) a kind of smoke (c) salty water (d) tiny ice cubes
22. 22.🚀 Which of these goes backward? (a) the rocket (b) water a swimmer pushes (c) the balloon (d) the swimmer
23. 23.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) violet (c) red (d) yellow
24. 24.🔍 Which is the odd one out? (a) an open sheet of paper (b) a feather (c) a paper helicopter (d) a stone
25. 25.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
26. 26.True or false: water a swimmer pushes goes forward. (a) True (b) False
27. 27.⚖️ 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) how much of each liquid (b) the same three liquids (c) the order of the layers (d) the order of pouring
28. 28.🔍 You drop a coin into a tub of water. What do you see? (a) it dissolves (b) it floats (c) it sinks (d) it bounces up
29. 29.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
30. 30.🧺 Which of these is not needed for the float-or-sink test? (a) a mirror (b) a tub of water (c) a towel for spills (d) a results table
31. 31.🔍 Which is the odd one out? (a) a plastic ruler (b) a strip of cloth (c) a sugar cube (d) a paper towel
32. 32.🚁 Which of these falls fast through the air? (a) a coin (b) a toy parachute (c) an open sheet of paper (d) a feather
33. 33.💧 In the covered bowl, where does the water vapour come from? (a) the air outside (b) the bowl itself (c) the cling film (d) water warmed by the Sun
34. 34.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a tall clear glass (c) yeast (d) cooking oil
35. 35.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is the one thing we change. (a) True (b) False
36. 36.🧺 Which of these is needed for the paper helicopter? (a) a paper clip (b) a magnet (c) turmeric powder (d) a mirror
37. 37.True or false: dew on morning grass is freezing. (a) True (b) False
38. 38.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is kept the same. (a) True (b) False
39. 39.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar stirred well (c) sugar left unstirred (d) sugar in warm water
40. 40.True or false: air from the balloon goes forward. (a) True (b) False

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