Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 618 · 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 — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the same glass (b) the same three liquids (c) the order of the layers (d) the order of pouring
2. 2.🔍 Which is the odd one out? (a) a ping-pong ball (b) a ball of clay (c) a metal key (d) a glass marble
3. 3.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it sank as sand (b) it spread in the water (c) it became air (d) it vanished for ever
4. 4.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.🍯 Which of these is less dense than water? (a) very salty water (b) honey (c) a coin (d) a ping-pong ball
6. 6.🧺 Which of these is needed for the water cycle bowl? (a) a battery cell (b) ice cubes (c) yeast (d) a mirror
7. 7.🔍 Which is the odd one out? (a) ice becoming water (b) butter going runny (c) drops on a cold glass (d) snow turning to water
8. 8.True or false: a big sugar cube dissolves faster. (a) False (b) True
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.🧺 Do we need a balloon for the balloon rocket? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a balloon (c) a sunny window (d) a clear glass of water
12. 12.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it floats away (c) it turns all red (d) the rainbow fades
13. 13.True or false: yeast is needed for the balloon rocket. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) a toy parachute (b) a glass marble (c) a steel spoon (d) a crumpled paper ball
15. 15.🧺 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
16. 16.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) small test objects (c) turmeric powder (d) a tub of water
17. 17.🔍 What do you see a day after a white flower stands in blue water? (a) the petals turn bluish (b) the flower floats away (c) the water turns green (d) the stem turns to ice
18. 18.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the stirring (b) time to dissolve (c) the water temperature
19. 19.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a tall clear glass (c) a mirror (d) a spoon
20. 20.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a balloon (b) a teaspoon (c) two clear glasses (d) cold water
21. 21.🛟 Does a pebble float or sink in water? (a) floats (b) sinks
22. 22.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same glass (b) the same white paper (c) the amount of water (d) brightness of rainbow
23. 23.🧺 Do we need a tall clear glass for the density tower? (a) needed (b) not needed
24. 24.🔮 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
25. 25.True or false: sugar in warm water dissolves faster. (a) False (b) True
26. 26.True or false: a sugar cube lets water climb up it. (a) True (b) False
27. 27.🍯 Is a cork denser or less dense than water? (a) less dense than water (b) denser than water
28. 28.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) bright sunlight (c) a balloon (d) a magnet
29. 29.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes backward (b) goes forward
30. 30.💧 Which of these does not let water climb? (a) a flower stem (b) a paper towel (c) a piece of foil (d) a cotton thread
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a mirror (d) a magnet
32. 32.🍯 Is a ping-pong ball denser or less dense than water? (a) denser than water (b) less dense than water
33. 33.🔍 Which is the odd one out? (a) a toy parachute (b) a feather (c) a steel spoon (d) a fluff of cotton
34. 34.🧺 Which of these is needed for the dissolving test? (a) cotton wool (b) honey (c) two clear glasses (d) a comb
35. 35.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.🛟 Which is a safe rule for the balloon rocket? (a) blow it till it bursts (b) put string round a neck (c) aim it at your friend (d) keep it away from faces
37. 37.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to hide the corks (c) to splash everyone (d) to win a prize
39. 39.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) it stays still (b) forward (c) straight down (d) backward
40. 40.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) wipe up spills at once (c) run around the tub (d) leave water on the floor

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