Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 636 · 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.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is sticky (c) oil is less dense (d) oil is heavier
2. 2.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a clear glass of water (c) a balloon (d) a magnet
3. 3.⚖️ 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
4. 4.🔍 Which is the odd one out? (a) honey (b) an ice cube (c) a pebble (d) a glass marble
5. 5.💧 Which change is this: drops under a pot lid? (a) evaporation (b) melting (c) freezing (d) condensation
6. 6.🧺 Do we need sunlight for the water cycle bowl? (a) needed (b) not needed
7. 7.True or false: a ping-pong ball is less dense than water. (a) True (b) False
8. 8.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is kept the same. (a) False (b) True
9. 9.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) pour more water (c) leave them wet (d) wipe them dry
10. 10.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) the same (b) not at all (c) faster (d) slower
11. 11.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it does not fall (c) so the Sun moves (d) so it turns blue
12. 12.🚁 What does the paper helicopter do as it falls? (a) it turns into a ball (b) it stays still in air (c) it spins round (d) it flies upward
13. 13.True or false: two clear glasses is needed for the dissolving test. (a) True (b) False
14. 14.True or false: cooking oil is less dense than water. (a) False (b) True
15. 15.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) whether it floats (c) the tub of water
16. 16.True or false: two chairs is needed for the balloon rocket. (a) True (b) False
17. 17.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is kept the same. (a) True (b) False
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the way we turn it (b) the same glass (c) the same card (d) how full the glass is
19. 19.True or false: a feather floats on water. (a) False (b) True
20. 20.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a battery cell (c) a results table (d) small test objects
21. 21.🔍 Which is the odd one out? (a) wet hair drying (b) a pond icing over (c) sweat drying on skin (d) a puddle drying up
22. 22.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) stare at the Sun (c) never look at the Sun (d) look at it in a mirror
23. 23.🛟 Does a dry leaf float or sink in water? (a) sinks (b) floats
24. 24.🧺 Do we need yeast for the paper helicopter? (a) needed (b) not needed
25. 25.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
26. 26.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) bright sunlight (c) a sunny window (d) a clear glass of water
27. 27.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a small cup (b) cling film (c) a battery cell (d) a big bowl
28. 28.⚖️ 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 measure it (b) we change it (c) we keep it the same
29. 29.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) at the very bottom (b) in the water layer (c) on top of the oil (d) in the oil layer
30. 30.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is the one thing we change. (a) True (b) False
31. 31.🧺 Which of these is not needed for the water cycle bowl? (a) water (b) ice cubes (c) a big bowl (d) a balloon
32. 32.True or false: sugar stirred well dissolves faster. (a) True (b) False
33. 33.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) turmeric powder (c) a spoon (d) water with food colour
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is kept the same. (a) True (b) False
35. 35.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
36. 36.🧺 Do we need a results table for the float-or-sink test? (a) needed (b) not needed
37. 37.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is kept the same. (a) False (b) True
38. 38.🧺 Which of these is not needed for the density tower? (a) honey (b) a tall clear glass (c) water with food colour (d) a magnet
39. 39.True or false: yeast is needed for the density tower. (a) True (b) False
40. 40.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) a mirror

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