Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 808 · 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.True or false: a dry leaf sinks in water. (a) True (b) False
2. 2.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) throw the glass (c) taste each layer (d) do not lick the spoon
3. 3.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.🚀 In “push back, move forward”, which way does gas from the rocket go? (a) goes backward (b) goes forward
5. 5.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) at the very bottom (b) in the oil layer (c) in the water layer (d) on top of the oil
6. 6.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
7. 7.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is what we measure. (a) False (b) True
8. 8.True or false: a flower stem does not let water climb. (a) True (b) False
9. 9.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) False (b) True
10. 10.🛟 Who should pour the warm water in the dissolving test? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
11. 11.🧺 Do we need a balloon for the float-or-sink test? (a) not needed (b) needed
12. 12.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) time for colour to show (b) the amount of water (c) the amount of colour (d) the length of the stem
13. 13.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) whether it floats (b) the amount of clay (c) the shape of the clay
14. 14.🧺 Which of these is not needed for the water cycle bowl? (a) cling film (b) a big bowl (c) a mirror (d) ice cubes
15. 15.🔮 Predict: you add two more paper clips. How does it fall? (a) it floats up (b) it stops in the air (c) slower (d) faster
16. 16.True or false: a towel for spills is needed for the float-or-sink test. (a) False (b) True
17. 17.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
18. 18.🛟 Does a steel spoon float or sink in water? (a) sinks (b) floats
19. 19.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it in a mirror (c) look at it through glass (d) never look at the Sun
21. 21.💧 Which of these does not let water climb? (a) a cotton thread (b) a piece of foil (c) a strip of cloth (d) a piece of chalk
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🚀 In “push back, move forward”, which way does the balloon go? (a) goes backward (b) goes forward
24. 24.⚖️ 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) how full the glass is (b) the same glass (c) the same card (d) the way we turn it
25. 25.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is kept the same. (a) False (b) True
26. 26.True or false: very salty water is less dense than water. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) cooking oil (b) a coin (c) very salty water (d) a glass marble
28. 28.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
29. 29.True or false: cooking oil is denser than water. (a) False (b) True
30. 30.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a magnet (c) a clear glass of water (d) turmeric powder
31. 31.🧺 Do we need a mirror for the float-or-sink test? (a) needed (b) not needed
32. 32.🥄 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) play near a deep pond (c) wipe up spills at once (d) leave water on the floor
34. 34.💧 Why do water drops form on the outside of a glass of ice water? (a) vapour in air cools (b) the glass sweats (c) the glass leaks (d) ice escapes the glass
35. 35.True or false: turmeric powder is needed for the balloon rocket. (a) True (b) False
36. 36.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card stays on (d) the card flies away
37. 37.🔮 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) all of it dissolves (c) some stays undissolved (d) the water turns solid
38. 38.True or false: a mirror is needed for the water rainbow. (a) False (b) True
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a glass of water (c) a stiff postcard (d) a towel
40. 40.🔍 Which is the odd one out? (a) a fluff of cotton (b) a toy parachute (c) a glass marble (d) an open sheet of paper

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