Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 238 · 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 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
2. 2.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
3. 3.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) very salty water (b) a coin (c) cooking oil (d) honey
5. 5.🔍 Which is the odd one out? (a) an open sheet of paper (b) a toy parachute (c) a fluff of cotton (d) a glass marble
6. 6.True or false: food colour dissolves in water. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) making ice lollies (b) a pond icing over (c) water becoming ice (d) snow turning to water
8. 8.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it sinks (c) it dissolves (d) it still floats
10. 10.True or false: sugar left unstirred dissolves faster. (a) False (b) True
11. 11.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
12. 12.🔍 Sand is stirred into water. What do you see after a while? (a) it turns blue (b) it settles at the bottom (c) it dissolves (d) it floats up
13. 13.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is kept the same. (a) True (b) False
14. 14.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.🧺 Which of these is needed for the balloon rocket? (a) two chairs (b) a magnet (c) a battery cell (d) a mirror
16. 16.True or false: a compass needle works by magnetism. (a) False (b) True
17. 17.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.True or false: yeast is needed for the float-or-sink test. (a) True (b) False
19. 19.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) spilled oil is slippery (c) oil attracts magnets (d) oil turns into honey
20. 20.🧺 Which of these is not needed for the paper helicopter? (a) a magnet (b) a strip of paper (c) a pencil (d) safety scissors
21. 21.🔍 Which is the odd one out? (a) a pebble (b) a ball of clay (c) a dry leaf (d) a steel spoon
22. 22.🧺 Do we need a pencil for the paper helicopter? (a) needed (b) not needed
23. 23.True or false: a magnetic chess set works by magnetism. (a) True (b) False
24. 24.True or false: a strip of cloth lets water climb up it. (a) False (b) True
25. 25.💧 Which of these does not let water climb? (a) a paper towel (b) a cotton thread (c) a piece of foil (d) a flower stem
26. 26.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a sunny window (c) a clear glass of water (d) a sheet of white paper
27. 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the shape of the clay (b) the amount of clay (c) whether it floats (d) the tub of water
28. 28.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a suction hook (d) a magnetic pin holder
29. 29.🧺 Which of these is needed for the float-or-sink test? (a) turmeric powder (b) a mirror (c) a balloon (d) a towel for spills
30. 30.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) whether it floats (b) the shape of the clay (c) the kind of clay (d) the tub of water
31. 31.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) yeast (c) a balloon (d) a sunny window
32. 32.🥄 Does a big sugar cube dissolve faster or slower? (a) slower (b) faster
33. 33.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) yeast (c) a tub of water (d) a results table
34. 34.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the big log (b) the small pebble (c) both of them (d) neither of them
35. 35.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) sugar (c) two clear glasses (d) a magnet
36. 36.💧 Which of these lets water climb up it? (a) a cotton thread (b) a plastic ruler (c) a glass marble (d) a rubber eraser
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a magnet (d) a glass of water
38. 38.🌈 How many colours do we name in a rainbow (VIBGYOR)?
39. 39.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
40. 40.True or false: a ping-pong ball floats on water. (a) True (b) False

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