Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 818 · 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.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it turns white (c) it sinks (d) it still floats
2. 2.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is what we measure. (a) False (b) True
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is kept the same. (a) False (b) True
5. 5.🔍 You drop a coin into a tub of water. What do you see? (a) it floats (b) it sinks (c) it dissolves (d) it bounces up
6. 6.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) warm water (c) cold water (d) a balloon
7. 7.🧺 Do we need a mirror for the water cycle bowl? (a) not needed (b) needed
8. 8.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to win a prize (c) to keep children safe (d) to hide the corks
9. 9.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is what we measure. (a) False (b) True
10. 10.True or false: a coin is denser than water. (a) True (b) False
11. 11.🧺 Do we need cold water for the dissolving test? (a) not needed (b) needed
12. 12.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it through glass (d) look at it in a mirror
13. 13.💧 Which change is this: sweat drying on skin? (a) freezing (b) melting (c) evaporation (d) condensation
14. 14.🍯 Is a glass marble denser or less dense than water? (a) denser than water (b) less dense than water
15. 15.🚀 In “push back, move forward”, which way does the balloon go? (a) goes forward (b) goes backward
16. 16.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
17. 17.🔍 How can you get the salt back from salty water? (a) keep it in a fridge (b) add more water (c) let the water evaporate (d) stir it more
18. 18.🧺 Do we need yeast for the density tower? (a) not needed (b) needed
19. 19.⚖️ 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 way we turn it (c) whether the card stays (d) the same glass
20. 20.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the slope of the string (b) how big we blow it (c) the same straw (d) distance it travels
21. 21.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water can scald (c) hot water is magnetic (d) hot water is heavy
22. 22.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes much farther (b) it turns into a kite (c) it goes less far (d) it flies off the string
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
25. 25.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) yeast (c) a magnet (d) a drinking straw
26. 26.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is kept the same. (a) False (b) True
27. 27.True or false: a magnet is not needed for the balloon rocket. (a) False (b) True
28. 28.🛟 Which rule keeps the density tower experiment safe? (a) throw the glass (b) taste each layer (c) pour it on the floor (d) do not lick the spoon
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a towel (d) a mirror
30. 30.True or false: a strip of cloth lets water climb up it. (a) False (b) True
31. 31.🚁 Dropped from a raised hand, does a crumpled paper ball fall slowly or fast? (a) falls slowly (b) falls fast
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) how much of each liquid (b) the order of the layers (c) the order of pouring
34. 34.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the water temperature (b) the amount of water (c) the kind of sugar (d) time to dissolve
35. 35.🧺 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 results table (d) turmeric powder
36. 36.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil turns into honey (c) spilled oil is slippery (d) oil attracts magnets
37. 37.🔍 Which is the odd one out? (a) a coin (b) a cork (c) a ping-pong ball (d) an ice cube
38. 38.🧺 Do we need a magnet for the density tower? (a) not needed (b) needed
39. 39.🚀 Which of these goes forward? (a) water from the oars (b) air from the balloon (c) water a swimmer pushes (d) the rowing boat
40. 40.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) water is hiding there (d) air inside pushes back

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