Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 257 · 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 mirror is needed for the water rainbow. (a) False (b) True
2. 2.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a clear glass of water (c) a battery cell (d) a mirror
3. 3.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) fewer drops form (b) the bowl freezes (c) the water turns red (d) more drops form
4. 4.🧺 Which of these is not needed for the water cycle bowl? (a) a battery cell (b) cling film (c) a small cup (d) water
5. 5.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
7. 7.🛟 Why should only a grown-up handle any hot water? (a) hot water is magnetic (b) hot water can scald (c) it changes colour (d) hot water is heavy
8. 8.True or false: a balloon is needed for the balloon rocket. (a) False (b) True
9. 9.True or false: a balloon is not needed for the paper helicopter. (a) True (b) False
10. 10.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🚁 Dropped from a raised hand, does an open sheet of paper fall slowly or fast? (a) falls fast (b) falls slowly
13. 13.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it can pop loudly (c) it turns into a kite (d) it changes colour
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) turmeric powder (d) a mirror
15. 15.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.🧺 Which of these is needed for the balloon rocket? (a) a mirror (b) yeast (c) a battery cell (d) a balloon
17. 17.📘 What pulls the paper helicopter down to the floor? (a) gravity (b) magnetism (c) the wind (d) air pressure
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.☀️ What is white sunlight really made of? (a) tiny drops of water (b) only yellow light (c) many colours mixed (d) tiny bits of dust
20. 20.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a towel for spills (c) a balloon (d) a results table
21. 21.🧺 Which of these is needed for the balloon rocket? (a) vinegar (b) a battery cell (c) yeast (d) a drinking straw
22. 22.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) the same (b) faster (c) slower (d) not at all
23. 23.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the same glass (b) the amount of water (c) brightness of rainbow
24. 24.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the small pebble (b) the big log (c) neither of them (d) both of them
25. 25.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
26. 26.🧺 Do we need cling film for the water cycle bowl? (a) not needed (b) needed
27. 27.💧 In the covered bowl, where does the water vapour come from? (a) the cling film (b) the air outside (c) the bowl itself (d) water warmed by the Sun
28. 28.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) sand (d) small pebbles
29. 29.🛟 Which of these floats on water? (a) a ball of clay (b) a coin (c) a pebble (d) an empty capped bottle
30. 30.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
31. 31.True or false: a steel spoon lets water climb up it. (a) False (b) True
32. 32.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a few hours of waiting (c) a white flower (d) a balloon
33. 33.🔍 Which is the odd one out? (a) air (b) a pebble (c) a ping-pong ball (d) a cork
34. 34.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
35. 35.🍯 Which of these is less dense than water? (a) a coin (b) a pebble (c) very salty water (d) cooking oil
36. 36.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cotton wool (b) warm water (c) sugar (d) two clear glasses
37. 37.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a balloon (b) safety scissors (c) a pencil (d) a paper clip
38. 38.⚖️ 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 kept the same. (a) True (b) False
39. 39.💧 Which change is this: drops under a pot lid? (a) evaporation (b) melting (c) freezing (d) condensation
40. 40.True or false: a mirror is needed for the balloon rocket. (a) False (b) True

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