Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 635 · 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.🔍 How can you get the salt back from salty water? (a) keep it in a fridge (b) stir it more (c) add more water (d) let the water evaporate
2. 2.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) whether it floats (b) the kind of clay (c) the tub of water (d) the shape of the clay
3. 3.⚖️ 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) the order of pouring (b) the same three liquids (c) the order of the layers (d) how much of each liquid
4. 4.⚖️ 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
5. 5.True or false: very salty water is less dense than water. (a) False (b) True
6. 6.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🧺 Which of these is not needed for the dissolving test? (a) a comb (b) a clock or timer (c) sugar (d) cold water
8. 8.🛟 Does a metal key float or sink in water? (a) floats (b) sinks
9. 9.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) two clear glasses (c) a mirror (d) warm water
11. 11.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) in the honey layer (c) under the honey (d) on top of the oil
12. 12.🧺 Do we need a mirror for the paper helicopter? (a) not needed (b) needed
13. 13.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) baking soda (d) sugar
15. 15.🧺 Do we need sugar for the dissolving test? (a) needed (b) not needed
16. 16.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we keep it the same (b) we measure it (c) we change it
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is what we measure. (a) False (b) True
18. 18.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we keep it the same (b) we change it (c) we measure it
19. 19.🥚 A fresh egg sinks in plain water. What makes it float? (a) a few ice cubes (b) lots of salt stirred in (c) more plain water (d) a little shaking
20. 20.⚖️ 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 “how much of each liquid”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls fast (b) falls slowly
23. 23.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) a teaspoon (c) a magnet (d) two clear glasses
24. 24.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we change it (b) we keep it the same (c) we measure it
26. 26.True or false: yeast is needed for the water cycle bowl. (a) True (b) False
27. 27.🚀 In “push back, move forward”, which way does gas from the rocket go? (a) goes backward (b) goes forward
28. 28.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
29. 29.🥄 Which of these dissolves faster? (a) a big sugar cube (b) sugar in icy water (c) powdered sugar (d) sugar left unstirred
30. 30.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) food colour (c) a few hours of waiting (d) a mirror
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a battery cell
33. 33.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) True (b) False
34. 34.🧺 Do we need yeast for the float-or-sink test? (a) needed (b) not needed
35. 35.🚁 Which of these falls fast through the air? (a) a paper helicopter (b) a feather (c) a toy parachute (d) a steel spoon
36. 36.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) time to reach the floor (b) the kind of paper (c) the length of the blades (d) the person dropping
37. 37.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
38. 38.🧺 Which of these is not needed for the balloon rocket? (a) two chairs (b) a drinking straw (c) a mirror (d) sticky tape
39. 39.🧺 Do we need a mirror for the float-or-sink test? (a) needed (b) not needed
40. 40.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed

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