Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 367 · 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.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) some stays undissolved (b) the sugar turns to salt (c) the water turns solid (d) all of it dissolves
2. 2.🧺 Do we need a long string for the balloon rocket? (a) needed (b) not needed
3. 3.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they become solid (c) they separate again (d) they mix for ever
4. 4.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
5. 5.🌈 In VIBGYOR, what number colour is blue?
6. 6.💧 Which change is this: wet clothes drying? (a) freezing (b) condensation (c) melting (d) evaporation
7. 7.⚖️ 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
8. 8.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a tub of water (c) small test objects (d) turmeric powder
9. 9.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a results table (c) a towel for spills (d) a battery cell
10. 10.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) a misty bathroom mirror (b) a puddle drying up (c) wet hair drying (d) wet clothes drying
14. 14.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
15. 15.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is the one thing we change. (a) True (b) False
16. 16.⚖️ 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 same three liquids (b) the same glass (c) the order of pouring (d) the order of the layers
17. 17.True or false: honey is not needed for the dissolving test. (a) False (b) True
18. 18.💧 Which of these is melting? (a) wet hair drying (b) drops on a cold glass (c) snow turning to water (d) drops under a pot lid
19. 19.True or false: a piece of chalk does not let water climb. (a) True (b) False
20. 20.🚁 Which of these falls fast through the air? (a) a steel spoon (b) a toy parachute (c) a feather (d) a fluff of cotton
21. 21.True or false: a balloon is needed for the dissolving test. (a) False (b) True
22. 22.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) whether it floats (b) the amount of clay (c) the shape of the clay (d) the tub of water
23. 23.True or false: a feather falls fast through the air. (a) False (b) True
24. 24.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) at the very bottom (c) in the water layer (d) in the oil layer
25. 25.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) less friction (c) more friction, less far (d) it goes faster
26. 26.🧺 Do we need turmeric powder for the density tower? (a) not needed (b) needed
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the kind of clay (b) the shape of the clay (c) the tub of water (d) the amount of clay
29. 29.True or false: yeast is not needed for the float-or-sink test. (a) True (b) False
30. 30.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it does not fall (c) it spins the other way (d) it turns blue
31. 31.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
32. 32.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes backward (b) goes forward
33. 33.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the kind of sugar is kept the same. (a) True (b) False
34. 34.🔍 Which is the odd one out? (a) an iron nail (b) a ping-pong ball (c) an ice cube (d) a feather
35. 35.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) a spoon (c) cooking oil (d) a magnet
36. 36.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a balloon (c) a white flower (d) a glass of water
37. 37.🥛 Which of these works by air pressure? (a) a suction hook (b) a magnetic pin holder (c) a fridge magnet (d) a magnetic chess set
38. 38.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
40. 40.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a magnet (b) a clear glass of water (c) bright sunlight (d) a sheet of white paper

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