Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 264 · 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 colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is kept the same. (a) True (b) False
2. 2.True or false: warm water is needed for the dissolving test. (a) False (b) True
3. 3.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
4. 4.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they never dry (b) slower (c) they turn to ice (d) faster
5. 5.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil attracts magnets (c) oil turns into honey (d) spilled oil is slippery
6. 6.🧺 Which of these is not needed for the water rainbow? (a) turmeric powder (b) a clear glass of water (c) a sheet of white paper (d) a sunny window
7. 7.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is the one thing we change. (a) True (b) False
8. 8.True or false: a cotton thread does not let water climb. (a) True (b) False
9. 9.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we change it (b) we measure it (c) we keep it the same
10. 10.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a mirror (b) warm water (c) a teaspoon (d) sugar
11. 11.True or false: a magnet is needed for the dissolving test. (a) True (b) False
12. 12.⚖️ 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 the one thing we change. (a) True (b) False
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 stay white (b) they all turn green (c) they fall off at once (d) they turn two colours
14. 14.🍯 Which of these is less dense than water? (a) a glass marble (b) a cork (c) honey (d) very salty water
15. 15.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) yellow (c) violet (d) red
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a mirror (c) a towel (d) a stiff postcard
17. 17.🥄 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) table salt (d) sawdust
18. 18.True or false: a piece of foil lets water climb up it. (a) True (b) False
19. 19.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) yeast (c) a sheet of white paper (d) a clear glass of water
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is the one thing we change. (a) False (b) True
21. 21.🔮 Predict: you fold the two blades the other way. What changes? (a) it turns blue (b) it spins the other way (c) it falls upward (d) it does not fall
22. 22.☀️ What is white sunlight really made of? (a) only yellow light (b) many colours mixed (c) tiny drops of water (d) tiny bits of dust
23. 23.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) sun or shade (b) the amount of water (c) how many drops form (d) the size of the bowl
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) the same glass (b) whether the card stays (c) how full the glass is
25. 25.💧 Which of these lets water climb up it? (a) a steel spoon (b) a plastic ruler (c) a rubber eraser (d) a strip of cloth
26. 26.🛟 Which is a safe rule for the balloon rocket? (a) aim it at your friend (b) blow it till it bursts (c) keep it away from faces (d) put string round a neck
27. 27.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) run around the tub (c) play near a deep pond (d) leave water on the floor
28. 28.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) time to reach the floor (b) the paper clip (c) the person dropping (d) the length of the blades
29. 29.🚁 Which of these falls fast through the air? (a) a toy parachute (b) a feather (c) a paper helicopter (d) a coin
30. 30.🔍 Which is the odd one out? (a) a pebble (b) very salty water (c) air (d) honey
31. 31.🚀 Which of these goes forward? (a) water from the oars (b) the rowing boat (c) water a swimmer pushes (d) air from the balloon
32. 32.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.True or false: a battery cell is needed for the coloured flower experiment. (a) True (b) False
34. 34.True or false: yeast is not needed for the water cycle bowl. (a) True (b) False
35. 35.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the glass breaks (c) the card stays on (d) the card flies away
36. 36.True or false: an open sheet of paper falls slowly through the air. (a) False (b) True
37. 37.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) wipe them dry (c) pour more water (d) slide on them
38. 38.🧺 Do we need a magnet for the paper helicopter? (a) needed (b) not needed
39. 39.🧺 Do we need a balloon for the float-or-sink test? (a) not needed (b) needed
40. 40.🧊 Why does an ice cube float on water? (a) ice is magnetic (b) water is sticky (c) ice is less dense (d) ice is very cold

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