Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 283 · 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.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a battery cell (b) sticky tape (c) a drinking straw (d) a long string
2. 2.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the amount of water (b) time for colour to show (c) the length of the stem
3. 3.🥄 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
4. 4.True or false: yeast is not needed for the float-or-sink test. (a) True (b) False
5. 5.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic chess set (c) a vacuum cleaner (d) a medicine dropper
6. 6.🧺 Which of these is needed for the balloon rocket? (a) a mirror (b) a battery cell (c) yeast (d) a balloon
7. 7.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it floats away (c) the rainbow fades (d) it turns all red
8. 8.🥄 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a magnetic pin holder (d) a drinking straw
10. 10.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sheet of white paper (c) a clear glass of water (d) turmeric powder
11. 11.True or false: gas from the rocket goes forward. (a) False (b) True
12. 12.🛟 Does an iron nail float or sink in water? (a) sinks (b) floats
13. 13.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a magnet (c) a shadow of ice (d) a small rainbow
14. 14.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the kind of paper (b) time to reach the floor (c) the length of the blades
15. 15.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) how big we blow it (b) distance it travels (c) the same straw (d) the same tape
16. 16.🌈 How many colours do we name in a rainbow (VIBGYOR)?
17. 17.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it changes colour (c) it turns into a kite (d) it gets too heavy
18. 18.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) yeast (c) a clear glass of water (d) a sunny window
19. 19.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) yeast (c) a balloon (d) a clear glass of water
20. 20.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
21. 21.🔍 Which is the odd one out? (a) a cork (b) a steel spoon (c) an iron nail (d) a metal key
22. 22.True or false: water becoming ice is freezing. (a) True (b) False
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) yeast (d) a sink or a bucket
24. 24.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
25. 25.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) on top of the oil (c) in the water layer (d) in the honey layer
26. 26.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it spread in the water (b) it sank as sand (c) it vanished for ever (d) it became air
27. 27.🔮 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 fall off at once (c) they turn two colours (d) they all turn green
28. 28.🚁 Which of these falls fast through the air? (a) a feather (b) a coin (c) a paper helicopter (d) a toy parachute
29. 29.True or false: a drinking straw works by magnetism. (a) True (b) False
30. 30.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) violet (c) orange (d) red
31. 31.True or false: vinegar is not needed for the balloon rocket. (a) False (b) True
32. 32.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) warm water (c) a teaspoon (d) a comb
33. 33.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) a big bowl (c) a mirror (d) ice cubes
34. 34.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is the one thing we change. (a) True (b) False
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the shape of the clay (b) whether it floats (c) the amount of clay (d) the tub of water
37. 37.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
38. 38.🔍 Which is the odd one out? (a) a dry leaf (b) an ice-cream stick (c) an ice cube (d) an iron nail
39. 39.💧 Which of these is melting? (a) drops on a cold glass (b) butter going runny (c) a misty bathroom mirror (d) drops under a pot lid
40. 40.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) it stays still (b) backward (c) forward (d) straight down

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