Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 276 · 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.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) the flat sheet (b) a sheet of glass (c) the crumpled ball (d) neither of them
2. 2.⚖️ 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 keep it the same (b) we measure it (c) we change it
3. 3.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a mirror (c) a clear glass of water (d) yeast
4. 4.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is what we measure. (a) True (b) False
5. 5.🧺 Which of these is needed for the density tower? (a) a battery cell (b) turmeric powder (c) a tall clear glass (d) a balloon
6. 6.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is what we measure. (a) False (b) True
7. 7.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) no change at all (c) more friction, less far (d) it goes faster
8. 8.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) in the oil layer (c) in the water layer (d) at the very bottom
9. 9.🛟 Why should only a grown-up handle any hot water? (a) hot water is magnetic (b) it changes colour (c) hot water is heavy (d) hot water can scald
10. 10.💧 Which of these is freezing? (a) butter going runny (b) drops on a cold glass (c) a pond icing over (d) a misty bathroom mirror
11. 11.🛟 Does a dry leaf float or sink in water? (a) floats (b) sinks
12. 12.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) cold water (c) two clear glasses (d) a magnet
13. 13.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
14. 14.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
15. 15.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) on a bed (d) over a sink or bucket
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a sink or a bucket (c) a glass of water (d) a stiff postcard
17. 17.🔍 Which is the odd one out? (a) dew on morning grass (b) making ice lollies (c) drops under a pot lid (d) drops on a cold glass
18. 18.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.⚖️ 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 keep it the same (c) we change it
20. 20.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
21. 21.🔍 You drop a coin into a tub of water. What do you see? (a) it bounces up (b) it floats (c) it sinks (d) it dissolves
22. 22.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) a glass of water (c) a magnet (d) a balloon
23. 23.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
24. 24.⚖️ 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 same white paper (b) the amount of water (c) brightness of rainbow
25. 25.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.⚖️ 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 same glass (b) the amount of water (c) brightness of rainbow (d) the time of day
27. 27.True or false: a strip of paper is needed for the paper helicopter. (a) False (b) True
28. 28.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) some stays undissolved (c) the water turns solid (d) the sugar turns to salt
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) a tub of water (c) a towel for spills (d) a balloon
31. 31.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) yeast (c) a tall clear glass (d) honey
32. 32.⚖️ 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 amount of water (b) the kind of flower (c) the length of the stem (d) time for colour to show
33. 33.🧺 Do we need cling film for the water cycle bowl? (a) needed (b) not needed
34. 34.True or false: a results table is needed for the float-or-sink test. (a) False (b) True
35. 35.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
36. 36.🧺 Which of these is needed for the balloon rocket? (a) a drinking straw (b) a mirror (c) vinegar (d) a battery cell
37. 37.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is the one thing we change. (a) False (b) True
38. 38.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a magnet (b) a tub of water (c) a results table (d) a towel for spills
39. 39.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a wobbly chair (c) a high window ledge (d) a roof edge
40. 40.🥄 Why does sugar dissolve faster in warm water? (a) particles move faster (b) cold water is wet (c) warm water is thicker (d) sugar likes the dark

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