Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 140 · 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 longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is what we measure. (a) True (b) False
2. 2.🧺 Do we need vinegar for the balloon rocket? (a) not needed (b) needed
3. 3.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) a mirror (d) a clear glass of water
4. 4.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it gets too heavy (c) it can pop loudly (d) it turns into a kite
5. 5.True or false: a battery cell is not needed for the density tower. (a) False (b) True
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) yeast (d) a glass of water
7. 7.🧺 Do we need a magnet for the density tower? (a) not needed (b) needed
8. 8.⚖️ 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) False (b) True
9. 9.True or false: water becoming ice is melting. (a) True (b) False
10. 10.True or false: a magnet is needed for the water cycle bowl. (a) True (b) False
11. 11.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of the layers is what we measure. (a) True (b) False
12. 12.True or false: a results table is not needed for the float-or-sink test. (a) True (b) False
13. 13.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a battery cell (c) honey (d) a tall clear glass
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) False (b) True
15. 15.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the water is coloured (c) the glass is painted (d) water splits the light
16. 16.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a magnet (b) a clear glass of water (c) a sheet of white paper (d) a sunny window
17. 17.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a mirror (c) bright sunlight (d) a sunny window
18. 18.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a mirror (b) a long string (c) sticky tape (d) a balloon
19. 19.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
20. 20.🌈 How many colours do we name in a rainbow (VIBGYOR)?
21. 21.True or false: a misty bathroom mirror is evaporation. (a) False (b) True
22. 22.🧺 Do we need a balloon for the dissolving test? (a) needed (b) not needed
23. 23.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) False (b) True
24. 24.🔍 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 vanished for ever (d) it became air
25. 25.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
26. 26.⚖️ 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 glass (b) the way we turn it (c) whether the card stays (d) how full the glass is
27. 27.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a tub of water (c) a balloon (d) a towel for spills
28. 28.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
29. 29.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
30. 30.True or false: cotton wool is needed for the dissolving test. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) a feather (b) a paper helicopter (c) a toy parachute (d) a coin
32. 32.🛟 How should you check if the sugar has dissolved? (a) taste it (b) look for leftover grains (c) poke it with a finger (d) smell it closely
33. 33.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) small test objects (c) a magnet (d) a results table
34. 34.🧺 Which of these is not needed for the coloured flower experiment? (a) a mirror (b) food colour (c) a few hours of waiting (d) a glass of water
35. 35.🍯 Which of these is denser than water? (a) an ice cube (b) air (c) honey (d) a cork
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a battery cell (c) a sink or a bucket (d) a glass of water
37. 37.⚖️ 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 change it (c) we keep it the same
38. 38.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is less dense (c) oil is sticky (d) oil is hot
39. 39.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a vacuum cleaner (c) a drinking straw (d) a magnetic chess set
40. 40.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) sunlight (c) a mirror (d) a small cup

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