Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 340 · 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.🔍 How can you get the salt back from salty water? (a) stir it more (b) add more water (c) let the water evaporate (d) keep it in a fridge
2. 2.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) a battery cell (c) a big bowl (d) sunlight
3. 3.🧺 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
4. 4.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) slide on them (c) leave them wet (d) pour more water
5. 5.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same card (b) how full the glass is (c) the way we turn it (d) whether the card stays
6. 6.🧺 Do we need a ruler for the paper helicopter? (a) not needed (b) needed
7. 7.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a magnet (c) cooking oil (d) a tall clear glass
8. 8.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic chess set (c) a suction hook (d) a medicine dropper
9. 9.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) red (b) blue (c) violet (d) green
10. 10.🧺 Do we need a comb for the dissolving test? (a) needed (b) not needed
11. 11.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the water turns solid (b) all of it dissolves (c) the sugar turns to salt (d) some stays undissolved
12. 12.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) throw the glass (c) taste each layer (d) pour it on the floor
13. 13.🧺 Which of these is needed for the density tower? (a) a mirror (b) a balloon (c) a magnet (d) water with food colour
14. 14.True or false: a long string is not needed for the balloon rocket. (a) True (b) False
15. 15.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) the card gets wet (d) it looks nicer
16. 16.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same straw (b) the same tape (c) how big we blow it (d) the slope of the string
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.🧺 Do we need a battery cell for the paper helicopter? (a) needed (b) not needed
19. 19.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same card (b) whether the card stays (c) the same glass (d) how full the glass is
21. 21.🔍 Which is the odd one out? (a) a piece of foil (b) a flower stem (c) a paper towel (d) a strip of cloth
22. 22.🛟 Does an empty capped bottle float or sink in water? (a) sinks (b) floats
23. 23.🛟 How should you check if the sugar has dissolved? (a) look for leftover grains (b) smell it closely (c) taste it (d) poke it with a finger
24. 24.🧺 Which of these is needed for the balloon rocket? (a) a magnet (b) sticky tape (c) yeast (d) a mirror
25. 25.🧺 Do we need turmeric powder for the paper helicopter? (a) not needed (b) needed
26. 26.True or false: a steel spoon falls slowly through the air. (a) True (b) False
27. 27.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) two chairs (c) a long string (d) a battery cell
28. 28.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) a battery cell (c) a balloon (d) turmeric powder
29. 29.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) play near a deep pond (c) leave water on the floor (d) wipe up spills at once
30. 30.🚁 Which of these falls slowly through the air? (a) a glass marble (b) a toy parachute (c) a crumpled paper ball (d) a stone
31. 31.🍯 Is honey denser or less dense than water? (a) denser than water (b) less dense than water
32. 32.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the stirring (b) the kind of sugar (c) the amount of water (d) the water temperature
33. 33.🔍 Which is the odd one out? (a) sand (b) sugar (c) chalk powder (d) sawdust
34. 34.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a medicine dropper (d) a compass needle
35. 35.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is what we measure. (a) True (b) False
37. 37.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) neither of them (b) both the same (c) the sugar cube (d) powdered sugar
38. 38.True or false: turmeric powder is not needed for the density tower. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a feather (b) a glass marble (c) an open sheet of paper (d) a fluff of cotton
40. 40.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the flower floats away (c) the water turns green (d) the petals turn bluish

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