Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 231 · 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? Which of these is what we measure? (a) the amount of water (b) the amount of sugar (c) time to dissolve (d) the kind of sugar
2. 2.🧺 Which of these is not needed for the dissolving test? (a) cold water (b) sugar (c) a mirror (d) a clock or timer
3. 3.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) powdered sugar (b) both the same (c) the sugar cube (d) neither of them
4. 4.🧺 Which of these is not needed for the dissolving test? (a) sugar (b) two clear glasses (c) a balloon (d) a clock or timer
5. 5.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a drinking straw (d) a suction hook
6. 6.True or false: sand dissolves in water. (a) False (b) True
7. 7.🧺 Which of these is needed for the float-or-sink test? (a) a mirror (b) a balloon (c) a results table (d) turmeric powder
8. 8.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a mirror (b) food colour (c) a few hours of waiting (d) a white flower
9. 9.📘 What does “dense” mean? (a) very thin (b) very colourful (c) very hot (d) heavy for its size
10. 10.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes backward (b) goes forward
11. 11.🛟 Who should pour the warm water in the dissolving test? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
12. 12.🍯 Which of these is less dense than water? (a) a coin (b) honey (c) an ice cube (d) a pebble
13. 13.🥄 Which of these dissolves in water? (a) cooking oil (b) sand (c) sawdust (d) table salt
14. 14.🛟 Which is a safe rule for the balloon rocket? (a) aim it at your friend (b) put string round a neck (c) blow it till it bursts (d) keep it away from faces
15. 15.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a sunny window (c) yeast (d) bright sunlight
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a sink or a bucket (d) a glass of water
17. 17.⚖️ 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
18. 18.🧺 Which of these is not needed for the density tower? (a) turmeric powder (b) honey (c) a spoon (d) cooking oil
19. 19.🥄 Why does sugar dissolve faster in warm water? (a) particles move faster (b) warm water is thicker (c) sugar likes the dark (d) cold water is wet
20. 20.⚖️ 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
21. 21.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a battery cell (d) a sheet of white paper
22. 22.🔍 Which is the odd one out? (a) a piece of thermocol (b) a pebble (c) a ball of clay (d) a coin
23. 23.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False
24. 24.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is what we measure. (a) False (b) True
25. 25.True or false: small test objects is not needed for the float-or-sink test. (a) False (b) True
26. 26.🚁 What does the paper helicopter do as it falls? (a) it spins round (b) it stays still in air (c) it turns into a ball (d) it flies upward
27. 27.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) balloons (c) prisms (d) clouds
28. 28.True or false: the rowing boat goes forward. (a) False (b) True
29. 29.🎈 What is the job of the straw on the string? (a) it blows air in (b) it holds water (c) it guides the balloon (d) it makes it heavier
30. 30.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a battery cell (b) a spoon (c) water with food colour (d) honey
31. 31.🚀 Which of these goes forward? (a) air from the balloon (b) the balloon (c) water from the oars (d) gas from the rocket
32. 32.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a magnet (d) a shadow of ice
33. 33.💧 Which change is this: ice becoming water? (a) melting (b) condensation (c) freezing (d) evaporation
34. 34.🚁 Which of these falls fast through the air? (a) a fluff of cotton (b) a paper helicopter (c) a stone (d) a feather
35. 35.🍯 Why does honey sink to the bottom of the glass? (a) it is the stickiest (b) it is the densest (c) it is yellow (d) it is the coldest
36. 36.True or false: an iron nail sinks in water. (a) False (b) True
37. 37.🍯 Which of these is denser than water? (a) air (b) a glass marble (c) an ice cube (d) a ping-pong ball
38. 38.💧 Which of these does not let water climb? (a) a strip of cloth (b) a cotton thread (c) a glass marble (d) a flower stem
39. 39.🚁 Dropped from a raised hand, does a feather fall slowly or fast? (a) falls fast (b) falls slowly
40. 40.🌈 How many colours do we name in a rainbow (VIBGYOR)?

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