Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 751 · 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 sugar dissolve faster in warm water or in cold water? True or false: the amount of water is what we measure. (a) False (b) True
2. 2.⚖️ 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
3. 3.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to win a prize (c) to splash everyone (d) to hide the corks
5. 5.🌈 In VIBGYOR, what number colour is violet?
6. 6.🥄 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the amount of water (c) the same glass
8. 8.💧 Which of these is freezing? (a) a pond icing over (b) wet hair drying (c) wet clothes drying (d) sweat drying on skin
9. 9.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a compass needle (c) a suction hook (d) a drinking straw
10. 10.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the paper clip (b) the kind of paper (c) the person dropping (d) the length of the blades
12. 12.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) how many drops form (b) the time we wait (c) sun or shade (d) the amount of water
13. 13.🍯 Is honey denser or less dense than water? (a) less dense than water (b) denser than water
14. 14.🚁 Which of these falls fast through the air? (a) a coin (b) an open sheet of paper (c) a feather (d) a paper helicopter
15. 15.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a mirror (c) bright sunlight (d) a clear glass of water
16. 16.🧺 Which of these is needed for the density tower? (a) a mirror (b) honey (c) yeast (d) a balloon
17. 17.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns all red (c) it turns brighter (d) it floats away
18. 18.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the same three liquids (b) the order of pouring (c) the order of the layers
19. 19.🧺 Do we need sugar for the dissolving test? (a) needed (b) not needed
20. 20.🔍 Which is the odd one out? (a) a piece of foil (b) a steel spoon (c) a flower stem (d) a glass marble
21. 21.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) backward (c) forward (d) it stays still
22. 22.True or false: food colour dissolves in water. (a) True (b) False
23. 23.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a sheet of white paper (c) a battery cell (d) a balloon
24. 24.True or false: sand does not dissolve in water. (a) True (b) False
25. 25.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is what we measure. (a) True (b) False
26. 26.True or false: a sugar cube does not let water climb. (a) True (b) False
27. 27.True or false: sugar left unstirred dissolves faster. (a) False (b) True
28. 28.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it changes colour (c) it can pop loudly (d) it turns into a kite
29. 29.🧺 Which of these is not needed for the dissolving test? (a) cold water (b) sugar (c) a clock or timer (d) a mirror
30. 30.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the petals turn red (c) no colour change (d) the stem turns blue
31. 31.🧺 Do we need vinegar for the balloon rocket? (a) needed (b) not needed
32. 32.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) food colour (c) a white flower (d) turmeric powder
34. 34.🔍 Which is the odd one out? (a) a metal key (b) a coin (c) a ping-pong ball (d) a ball of clay
35. 35.🍯 Is air denser or less dense than water? (a) less dense than water (b) denser than water
36. 36.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
37. 37.🧺 Which of these is needed for the balloon rocket? (a) a battery cell (b) a drinking straw (c) turmeric powder (d) a mirror
38. 38.True or false: honey is less dense than water. (a) True (b) False
39. 39.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) water with food colour (c) a spoon (d) a magnet
40. 40.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we measure it (b) we keep it the same (c) we change it

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