Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 390 · 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.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) both the same (c) neither of them (d) powdered sugar
3. 3.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
4. 4.True or false: making ice lollies is freezing. (a) True (b) False
5. 5.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) bright sunlight (c) a battery cell (d) a sunny window
6. 6.True or false: a glass of water is not needed for the coloured flower experiment. (a) True (b) False
7. 7.🎈 Why does the balloon rocket move along the string? (a) the string pulls it (b) a magnet pulls it (c) escaping air pushes it (d) the straw is heavy
8. 8.🚁 Which of these falls slowly through the air? (a) a steel spoon (b) a paper helicopter (c) a glass marble (d) a stone
9. 9.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar left unstirred (c) sugar in warm water (d) sugar stirred well
10. 10.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.🧺 Do we need a results table for the float-or-sink test? (a) not needed (b) needed
12. 12.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) green (b) violet (c) red (d) blue
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a balloon (d) a towel
14. 14.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) a small cup (c) a mirror (d) ice cubes
15. 15.🥄 Which of these does not dissolve in water? (a) cooking oil (b) table salt (c) baking soda (d) food colour
16. 16.True or false: a towel for spills is not needed for the float-or-sink test. (a) False (b) True
17. 17.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water is magnetic (c) hot water can scald (d) hot water is heavy
18. 18.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.💧 Which change is this: drops on a cold glass? (a) evaporation (b) freezing (c) condensation (d) melting
20. 20.True or false: yeast is not needed for the balloon rocket. (a) False (b) True
21. 21.💧 Which change is this: a puddle drying up? (a) freezing (b) melting (c) evaporation (d) condensation
22. 22.🚁 Which of these falls fast through the air? (a) a toy parachute (b) an open sheet of paper (c) a stone (d) a fluff of cotton
23. 23.🧺 Which of these is needed for the density tower? (a) yeast (b) a balloon (c) turmeric powder (d) honey
24. 24.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) sugar (d) chalk powder
25. 25.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
26. 26.🔮 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 turn two colours (c) they all turn green (d) they fall off at once
27. 27.🧺 Which of these is not needed for the density tower? (a) a spoon (b) water with food colour (c) yeast (d) cooking oil
28. 28.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it fall slower (b) to stop the spinning (c) to make it magnetic (d) to weigh down the bottom
29. 29.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a towel for spills (c) small test objects (d) a balloon
30. 30.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the person dropping”? (a) we measure it (b) we keep it the same (c) we change it
31. 31.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a balloon (b) food colour (c) a glass of water (d) a white flower
32. 32.True or false: a ping-pong ball floats on water. (a) False (b) True
33. 33.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
34. 34.⚖️ 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 length of the stem (b) the amount of water (c) the amount of colour (d) the kind of flower
35. 35.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.True or false: yeast is needed for the water cycle bowl. (a) True (b) False
37. 37.True or false: a drinking straw works by air pressure. (a) False (b) True
38. 38.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it in a mirror (d) look at it through glass
39. 39.🔍 Which is the odd one out? (a) a pebble (b) a ping-pong ball (c) a cork (d) cooking oil
40. 40.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed

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