Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 842 · 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.🔍 Which is the odd one out? (a) butter going runny (b) ice becoming water (c) drops under a pot lid (d) snow turning to water
2. 2.🌈 How many colours do we name in a rainbow (VIBGYOR)?
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) True (b) False
4. 4.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is kept the same. (a) True (b) False
5. 5.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) the paper makes colours (d) water splits the light
6. 6.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the same glass (b) the order of the layers (c) how much of each liquid (d) the order of pouring
7. 7.🔍 Which is the odd one out? (a) a cork (b) a feather (c) a dry leaf (d) a pebble
8. 8.🛟 Which of these floats on water? (a) a coin (b) a pebble (c) a glass marble (d) an ice cube
9. 9.True or false: small test objects is not needed for the float-or-sink test. (a) True (b) False
10. 10.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it sinks faster (b) it dissolves (c) it turns to stone (d) it can float
11. 11.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) throw the glass (c) pour it on the floor (d) taste each layer
12. 12.🍯 Is cooking oil denser or less dense than water? (a) less dense than water (b) denser than water
13. 13.True or false: a tub of water is not needed for the float-or-sink test. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) a fluff of cotton (b) a feather (c) a paper helicopter (d) a crumpled paper ball
15. 15.True or false: a glass marble does not let water climb. (a) False (b) True
16. 16.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
17. 17.🛟 Which is a safe rule for the balloon rocket? (a) put string round a neck (b) blow it till it bursts (c) keep it away from faces (d) aim it at your friend
18. 18.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) small test objects (c) a mirror (d) a towel for spills
19. 19.🚁 Which of these falls fast through the air? (a) a paper helicopter (b) a feather (c) a fluff of cotton (d) a crumpled paper ball
20. 20.🛟 Which of these sinks in water? (a) a feather (b) a dry leaf (c) an empty capped bottle (d) a ball of clay
21. 21.🍯 Which of these is denser than water? (a) honey (b) cooking oil (c) an ice cube (d) a cork
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the paper clip (b) the drop height (c) the length of the blades (d) the person dropping
23. 23.True or false: gas from the rocket goes backward. (a) False (b) True
24. 24.🧺 Which of these is not needed for the water rainbow? (a) a magnet (b) a sheet of white paper (c) a clear glass of water (d) bright sunlight
25. 25.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is kept the same. (a) True (b) False
26. 26.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) lightning (b) sunshine (c) wind (d) rain
27. 27.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) run around the tub (c) play near a deep pond (d) wipe up spills at once
28. 28.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
29. 29.🛟 Does a coin float or sink in water? (a) sinks (b) floats
30. 30.True or false: a balloon is needed for the paper helicopter. (a) True (b) False
31. 31.🧺 Do we need water with food colour for the density tower? (a) not needed (b) needed
32. 32.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the paper clip (b) time to reach the floor (c) the drop height (d) the length of the blades
33. 33.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.True or false: yeast is not needed for the float-or-sink test. (a) False (b) True
35. 35.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a tall clear glass (c) yeast (d) honey
36. 36.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a mirror (c) a clear glass of water (d) bright sunlight
37. 37.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
38. 38.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) sticky tape (c) vinegar (d) a long string
40. 40.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) both the same (c) neither of them (d) powdered sugar

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