Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 136 · 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.🥄 Does sugar stirred well dissolve faster or slower? (a) slower (b) faster
2. 2.True or false: a battery cell is not needed for the balloon rocket. (a) False (b) True
3. 3.⚖️ 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) True (b) False
4. 4.🔍 Which is the odd one out? (a) a plastic ruler (b) a piece of chalk (c) a strip of cloth (d) a paper towel
5. 5.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the person dropping (b) the paper clip (c) the drop height (d) time to reach the floor
6. 6.True or false: a fridge magnet works by air pressure. (a) True (b) False
7. 7.🔮 A cork floats in tap water. What happens in very salty water? (a) it sinks (b) it turns white (c) it still floats (d) it dissolves
8. 8.🔍 Which is the odd one out? (a) wet hair drying (b) sweat drying on skin (c) drops on a cold glass (d) wet clothes drying
9. 9.📘 What does “dense” mean? (a) very colourful (b) heavy for its size (c) very thin (d) very hot
10. 10.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) the water increases (c) some water evaporates (d) it turns to ice
11. 11.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) faster (c) it stops in the air (d) it floats up
12. 12.⚖️ 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) False (b) True
13. 13.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
15. 15.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is less dense (c) oil is hot (d) oil is sticky
16. 16.🥄 Which of these does not dissolve in water? (a) sugar (b) table salt (c) baking soda (d) small pebbles
17. 17.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the way we turn it (c) how full the glass is
18. 18.True or false: a magnetic chess set works by air pressure. (a) False (b) True
19. 19.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the time of day (b) the amount of water (c) the same white paper (d) the same glass
20. 20.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.⚖️ 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 pouring”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.🧺 Which of these is not needed for the density tower? (a) a balloon (b) honey (c) a spoon (d) water with food colour
23. 23.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) the rainbow fades (d) it turns brighter
24. 24.🚁 Which of these falls slowly through the air? (a) a glass marble (b) a crumpled paper ball (c) a coin (d) a fluff of cotton
25. 25.True or false: turmeric powder is needed for the density tower. (a) True (b) False
26. 26.🧺 Which of these is needed for the density tower? (a) a mirror (b) a spoon (c) turmeric powder (d) yeast
27. 27.True or false: a big sugar cube dissolves faster. (a) False (b) True
28. 28.True or false: a small cup is not needed for the water cycle bowl. (a) True (b) False
29. 29.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
30. 30.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes backward (b) goes forward
31. 31.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) a paper clip (c) a strip of paper (d) a battery cell
32. 32.🧺 Which of these is not needed for the dissolving test? (a) warm water (b) a clock or timer (c) a teaspoon (d) a comb
33. 33.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
34. 34.🚀 In “push back, move forward”, which way does gas from the rocket go? (a) goes backward (b) goes forward
35. 35.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) a magnet (c) cling film (d) ice cubes
36. 36.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a magnet (b) a drinking straw (c) sticky tape (d) two chairs
37. 37.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
38. 38.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) in the water layer (c) in the oil layer (d) at the very bottom
39. 39.True or false: sugar in warm water dissolves faster. (a) False (b) True
40. 40.True or false: an ice cube is less dense than water. (a) False (b) True

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