Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 266 · 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: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
2. 2.True or false: a balloon is not needed for the water cycle bowl. (a) False (b) True
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) water is hiding there (d) the bottle is magnetic
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.True or false: cooking oil is less dense than water. (a) False (b) True
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) yeast (d) a mirror
7. 7.🛟 Does a metal key float or sink in water? (a) floats (b) sinks
8. 8.🔍 Which is the odd one out? (a) a piece of thermocol (b) a feather (c) a ball of clay (d) an ice cube
9. 9.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the kind of sugar is what we measure. (a) False (b) True
10. 10.💧 Which change is this: drops under a pot lid? (a) freezing (b) condensation (c) evaporation (d) melting
11. 11.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) a paper cutter (c) safety scissors (d) sharp kitchen shears
12. 12.🧺 Do we need a strip of paper for the paper helicopter? (a) not needed (b) needed
13. 13.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is the one thing we change. (a) False (b) True
14. 14.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) a magnet (d) bright sunlight
15. 15.True or false: yeast is needed for the water cycle bowl. (a) True (b) False
16. 16.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it dissolves (c) it sinks faster (d) it can float
17. 17.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) throw the glass (c) pour it on the floor (d) do not lick the spoon
18. 18.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same glass is kept the same. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a toy parachute (b) a crumpled paper ball (c) a fluff of cotton (d) a paper helicopter
20. 20.⚖️ 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) the size of the bowl (b) sun or shade (c) how many drops form
21. 21.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
23. 23.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a shadow of ice (d) a magnet
24. 24.💧 Which of these does not let water climb? (a) a sugar cube (b) a cotton thread (c) a flower stem (d) a steel spoon
25. 25.🔍 You drop a coin into a tub of water. What do you see? (a) it dissolves (b) it sinks (c) it floats (d) it bounces up
26. 26.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) air (d) water
27. 27.🔮 Predict: you blow the balloon up only a little. What happens? (a) it flies off the string (b) it goes much farther (c) it goes less far (d) it turns into a kite
28. 28.🧺 Which of these is needed for the density tower? (a) a magnet (b) a tall clear glass (c) yeast (d) a battery cell
29. 29.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.💧 Which of these is evaporation? (a) dew on morning grass (b) wet clothes drying (c) snow turning to water (d) butter going runny
31. 31.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil attracts magnets (c) oil makes it rain (d) oil turns into honey
32. 32.🔍 Which is the odd one out? (a) a steel spoon (b) a piece of foil (c) a piece of chalk (d) a rubber eraser
33. 33.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) backward (b) forward (c) straight down (d) it stays still
34. 34.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) bright sunlight (c) a clear glass of water (d) a sheet of white paper
35. 35.⚖️ 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 three liquids”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.🍯 Which of these is less dense than water? (a) honey (b) cooking oil (c) a pebble (d) a coin
37. 37.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) a small cup (c) a magnet (d) sunlight
38. 38.True or false: yeast is not needed for the water cycle bowl. (a) True (b) False
39. 39.⚖️ 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 order of the layers”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.True or false: a results table is needed for the float-or-sink test. (a) True (b) False

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