Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 17 · 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 should you check if the sugar has dissolved? (a) look for leftover grains (b) taste it (c) poke it with a finger (d) smell it closely
2. 2.True or false: a magnet is needed for the coloured flower experiment. (a) False (b) True
3. 3.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to keep children safe (c) to win a prize (d) to splash everyone
4. 4.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) turmeric powder (c) a sunny window (d) a clear glass of water
5. 5.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the drop height (b) the paper clip (c) the person dropping (d) the length of the blades
6. 6.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is what we measure. (a) False (b) True
8. 8.🚁 Which of these falls slowly through the air? (a) a crumpled paper ball (b) a stone (c) a steel spoon (d) a fluff of cotton
9. 9.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) at the very bottom (b) in the oil layer (c) on top of the oil (d) in the water layer
10. 10.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a mirror (c) turmeric powder (d) a sheet of white paper
11. 11.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of water (b) the water temperature (c) time to dissolve (d) the stirring
12. 12.True or false: a ping-pong ball is less dense than water. (a) True (b) False
13. 13.🥄 Does sugar in icy water dissolve faster or slower? (a) faster (b) slower
14. 14.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True
15. 15.🌈 In VIBGYOR, what number colour is orange?
16. 16.🧺 Do we need small test objects for the float-or-sink test? (a) needed (b) not needed
17. 17.True or false: a spoon is not needed for the density tower. (a) False (b) True
18. 18.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) False (b) True
19. 19.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
20. 20.🥄 Which of these dissolves slower? (a) sugar stirred well (b) powdered sugar (c) sugar in warm water (d) a big sugar cube
21. 21.⚖️ 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) how many drops form (b) sun or shade (c) the cling film cover
22. 22.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a clear glass of water (c) a balloon (d) a mirror
23. 23.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) time to reach the floor (b) the kind of paper (c) the length of the blades (d) the person dropping
24. 24.🧺 Which of these is needed for the density tower? (a) a battery cell (b) turmeric powder (c) a magnet (d) a spoon
25. 25.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) the stem is hot (c) petals lose water to air (d) petals are magnetic
26. 26.🧺 Which of these is not needed for the water cycle bowl? (a) ice cubes (b) cling film (c) a balloon (d) water
27. 27.True or false: a results table is not needed for the float-or-sink test. (a) True (b) False
28. 28.🥄 Which of these dissolves in water? (a) sand (b) sawdust (c) chalk powder (d) sugar
29. 29.🧺 Do we need sunlight for the water cycle bowl? (a) needed (b) not needed
30. 30.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is kept the same. (a) False (b) True
31. 31.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the time of day (b) the amount of water (c) brightness of rainbow
32. 32.🧺 Do we need a magnet for the density tower? (a) needed (b) not needed
33. 33.⚖️ 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
34. 34.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a strip of cloth (c) a steel spoon (d) a glass marble
35. 35.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) a few ice cubes (c) lots of salt stirred in (d) more plain water
36. 36.🛟 Which of these floats on water? (a) a coin (b) a ball of clay (c) a steel spoon (d) an ice cube
37. 37.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes forward (b) goes backward
38. 38.⚖️ 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 keep it the same (b) we change it (c) we measure it
39. 39.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a battery cell (c) small test objects (d) a tub of water
40. 40.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism

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