Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 253 · 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.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.🔍 Which is the odd one out? (a) an ice cube (b) a cork (c) a ping-pong ball (d) honey
3. 3.True or false: a balloon is needed for the density tower. (a) True (b) False
4. 4.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it changes colour (c) it gets too heavy (d) it can pop loudly
5. 5.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.⚖️ 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
7. 7.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
8. 8.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) an ice cube (b) a coin (c) cooking oil (d) air
10. 10.🌊 What pushes a floating cork upward? (a) the water (b) the tub (c) the cork itself (d) the air above
11. 11.🛟 Which of these floats on water? (a) a steel spoon (b) a metal key (c) a cork (d) a pebble
12. 12.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) more friction, less far (c) less friction (d) it goes faster
13. 13.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they turn two colours (b) they fall off at once (c) they stay white (d) they all turn green
14. 14.True or false: sugar stirred well dissolves slower. (a) False (b) True
15. 15.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
16. 16.🧺 Which of these is not needed for the density tower? (a) cooking oil (b) a spoon (c) honey (d) a battery cell
17. 17.🥄 Which of these dissolves faster? (a) a big sugar cube (b) sugar in icy water (c) sugar stirred well (d) sugar left unstirred
18. 18.🧺 Which of these is needed for the water cycle bowl? (a) yeast (b) a mirror (c) a magnet (d) a small cup
19. 19.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) water (c) a balloon (d) sunlight
20. 20.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) a drinking straw (c) two chairs (d) turmeric powder
21. 21.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) faster (b) they never dry (c) they turn to ice (d) slower
22. 22.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) turmeric powder (d) bright sunlight
23. 23.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we change it (b) we keep it the same (c) we measure it
24. 24.True or false: a magnet is not needed for the coloured flower experiment. (a) True (b) False
25. 25.🔍 What do you see after pouring honey, water and oil into one glass? (a) one mixed colour (b) the glass gets hot (c) three separate layers (d) bubbles of gas
26. 26.🛟 Which is a safe rule for the balloon rocket? (a) put string round a neck (b) aim it at your friend (c) blow it till it bursts (d) keep it away from faces
27. 27.🌈 How many colours do we name in a rainbow (VIBGYOR)?
28. 28.True or false: the rocket goes backward. (a) False (b) True
29. 29.💧 Which of these is melting? (a) snow turning to water (b) water becoming ice (c) making ice lollies (d) a puddle drying up
30. 30.True or false: honey is less dense than water. (a) False (b) True
31. 31.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) yeast (b) water (c) ice cubes (d) a big bowl
32. 32.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
33. 33.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a suction hook
34. 34.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
35. 35.🧺 Which of these is needed for the float-or-sink test? (a) a magnet (b) a tub of water (c) a battery cell (d) a balloon
36. 36.🔮 Predict: you add two more paper clips. How does it fall? (a) faster (b) it floats up (c) slower (d) it stops in the air
37. 37.🚢 Why can a heavy steel ship float on the sea? (a) steel is very light (b) sea water is warm (c) it has a magnet (d) its hollow shape
38. 38.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is kept the same. (a) True (b) False
39. 39.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to smoke (b) it turns to salt (c) it disappears (d) it turns to drops
40. 40.⚖️ 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 change it (c) we measure it

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