Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 285 · 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.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) False (b) True
2. 2.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes forward (b) goes backward
3. 3.🧺 Which of these is needed for the float-or-sink test? (a) a tub of water (b) yeast (c) a magnet (d) a battery cell
4. 4.🚀 In “push back, move forward”, which way does gas from the rocket go? (a) goes forward (b) goes backward
5. 5.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to smoke (b) it turns to drops (c) it disappears (d) it turns to salt
6. 6.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) sugar in icy water (c) a big sugar cube (d) sugar in warm water
7. 7.True or false: chalk powder does not dissolve in water. (a) False (b) True
8. 8.True or false: a cork is denser than water. (a) True (b) False
9. 9.🧺 Do we need a balloon for the paper helicopter? (a) needed (b) not needed
10. 10.💧 Which change is this: ice becoming water? (a) freezing (b) condensation (c) melting (d) evaporation
11. 11.🍯 Which of these is less dense than water? (a) a pebble (b) honey (c) very salty water (d) a ping-pong ball
12. 12.📘 What does “dense” mean? (a) heavy for its size (b) very colourful (c) very thin (d) very hot
13. 13.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) water with food colour (c) a tall clear glass (d) a mirror
14. 14.True or false: an ice cube is less dense than water. (a) True (b) False
15. 15.⚖️ 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) sun or shade (b) how many drops form (c) the amount of water
16. 16.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
17. 17.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a glass of water (c) a balloon (d) food colour
18. 18.⚖️ 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 measure it (b) we keep it the same (c) we change it
19. 19.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a toy parachute (c) a feather (d) an open sheet of paper
20. 20.True or false: a towel for spills is needed for the float-or-sink test. (a) True (b) False
21. 21.🧺 Which of these is needed for the water cycle bowl? (a) a mirror (b) a big bowl (c) yeast (d) a balloon
22. 22.🧺 Do we need turmeric powder for the paper helicopter? (a) not needed (b) needed
23. 23.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it sinks at once (c) colour climbs up it (d) it turns to plastic
25. 25.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) a magnet (d) small test objects
26. 26.🧺 Do we need a battery cell for the balloon rocket? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) turmeric powder (b) a white flower (c) a glass of water (d) a few hours of waiting
28. 28.🧺 Which of these is not needed for the density tower? (a) a tall clear glass (b) water with food colour (c) honey (d) a battery cell
29. 29.🧺 Which of these is not needed for the dissolving test? (a) two clear glasses (b) warm water (c) a teaspoon (d) honey
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a magnet (b) a sunny window (c) a sheet of white paper (d) bright sunlight
31. 31.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is the one thing we change. (a) False (b) True
32. 32.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
33. 33.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) air pushing up (d) a magnet
34. 34.🚁 Which of these falls fast through the air? (a) a paper helicopter (b) a crumpled paper ball (c) a toy parachute (d) a feather
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is what we measure. (a) False (b) True
36. 36.🛟 Which scissors should children use to cut the paper? (a) safety scissors (b) sharp kitchen shears (c) a paper cutter (d) gardening shears
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) yeast (d) a mirror
38. 38.🔍 Which is the odd one out? (a) a plastic ruler (b) a steel spoon (c) a sugar cube (d) a rubber eraser
39. 39.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a pond icing over (b) wet hair drying (c) water becoming ice (d) making ice lollies

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