Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 228 · 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 many colours do we name in a rainbow (VIBGYOR)?
2. 2.📘 What does “dense” mean? (a) very colourful (b) very thin (c) heavy for its size (d) very hot
3. 3.⚖️ 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 pouring is the one thing we change. (a) False (b) True
4. 4.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🛟 Which of these floats on water? (a) an ice cube (b) a coin (c) an iron nail (d) a steel spoon
6. 6.🧺 Do we need a magnet for the density tower? (a) needed (b) not needed
7. 7.True or false: water with food colour is needed for the density tower. (a) True (b) False
8. 8.True or false: honey is needed for the density tower. (a) True (b) False
9. 9.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is the one thing we change. (a) True (b) False
10. 10.🧺 Which of these is needed for the density tower? (a) yeast (b) turmeric powder (c) honey (d) a magnet
11. 11.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
12. 12.🛟 What should you do after handling food colour? (a) wipe them on walls (b) wash your hands (c) rub your eyes (d) lick your fingers
13. 13.🔍 Which is the odd one out? (a) a paper towel (b) a strip of cloth (c) a cotton thread (d) a piece of foil
14. 14.True or false: a cotton thread lets water climb up it. (a) True (b) False
15. 15.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is kept the same. (a) True (b) False
16. 16.🍯 Which of these is denser than water? (a) very salty water (b) cooking oil (c) a ping-pong ball (d) a cork
17. 17.⚖️ 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) False (b) True
18. 18.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) safety scissors (c) a ruler (d) a balloon
19. 19.🚁 Dropped from a raised hand, does a steel spoon fall slowly or fast? (a) falls slowly (b) falls fast
20. 20.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a bicycle pump
21. 21.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) food colour (c) a few hours of waiting (d) turmeric powder
22. 22.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) a results table (c) a mirror (d) a tub of water
23. 23.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is what we measure. (a) False (b) True
24. 24.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a magnet (b) a spoon (c) water with food colour (d) a tall clear glass
25. 25.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the water layer (b) on top of the oil (c) in the oil layer (d) at the very bottom
27. 27.⚖️ 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 order of the layers”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) vinegar (c) a drinking straw (d) a mirror
29. 29.🔍 Which is the odd one out? (a) a paper helicopter (b) an open sheet of paper (c) a glass marble (d) a feather
30. 30.True or false: yeast is needed for the water cycle bowl. (a) False (b) True
31. 31.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
32. 32.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the kind of sugar (b) the amount of sugar (c) time to dissolve (d) the stirring
33. 33.🧺 Do we need a balloon for the dissolving test? (a) needed (b) not needed
34. 34.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a results table (c) a magnet (d) a tub of water
35. 35.🛟 Does a steel spoon float or sink in water? (a) floats (b) sinks
36. 36.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the sugar turns to salt (b) some stays undissolved (c) the water turns solid (d) all of it dissolves
37. 37.True or false: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
38. 38.True or false: a pebble is less dense than water. (a) True (b) False
39. 39.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
40. 40.💧 Which of these is melting? (a) drops under a pot lid (b) butter going runny (c) water becoming ice (d) drops on a cold glass

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