Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 166 · 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 a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is the one thing we change. (a) True (b) False
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the same card (c) how full the glass is
3. 3.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it gets too heavy (c) it can pop loudly (d) it changes colour
4. 4.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) sun or shade (b) the size of the bowl (c) the time we wait (d) the amount of water
5. 5.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the stirring (b) the amount of sugar (c) the amount of water (d) the water temperature
6. 6.🥛 Which of these works by magnetism? (a) a compass needle (b) a suction hook (c) a drinking straw (d) a bicycle pump
7. 7.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so the Sun moves (c) so it gets hot (d) so it does not fall
8. 8.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the water layer (b) on top of the oil (c) at the very bottom (d) in the oil layer
9. 9.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a magnet (b) a white flower (c) a glass of water (d) food colour
11. 11.🧺 Do we need a big bowl for the water cycle bowl? (a) needed (b) not needed
12. 12.🌈 How many colours do we name in a rainbow (VIBGYOR)?
13. 13.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
14. 14.🥄 Which of these dissolves faster? (a) sugar stirred well (b) sugar left unstirred (c) sugar in icy water (d) a big sugar cube
15. 15.🔍 Which is the odd one out? (a) a paper helicopter (b) an open sheet of paper (c) a fluff of cotton (d) a crumpled paper ball
16. 16.🔮 Predict: you fold the two blades the other way. What changes? (a) it does not fall (b) it turns blue (c) it falls upward (d) it spins the other way
17. 17.⚖️ 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 keep it the same (c) we change it
18. 18.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a tub of water (c) small test objects (d) a battery cell
19. 19.🥄 Does cooking oil dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.⚖️ 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
21. 21.🧺 Which of these is not needed for the dissolving test? (a) a teaspoon (b) a clock or timer (c) two clear glasses (d) a balloon
22. 22.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) water (c) a small cup (d) turmeric powder
24. 24.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the petals turn red (c) the flower glows (d) no colour change
25. 25.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a sundial (b) a fridge magnet (c) a mirror (d) a balloon rocket
26. 26.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a grown-up (c) a pet (d) a toddler
27. 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the tub of water (b) the amount of clay (c) the shape of the clay (d) the kind of clay
28. 28.True or false: a big sugar cube dissolves faster. (a) True (b) False
29. 29.🔍 Which is the odd one out? (a) cooking oil (b) a glass marble (c) a pebble (d) very salty water
30. 30.True or false: water with food colour is not needed for the density tower. (a) True (b) False
31. 31.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
32. 32.🧺 Do we need a mirror for the density tower? (a) needed (b) not needed
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) bright sunlight (d) a magnet
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a battery cell (d) turmeric powder
35. 35.🥄 Which of these dissolves in water? (a) food colour (b) cooking oil (c) sand (d) chalk powder
36. 36.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we keep it the same (b) we change it (c) we measure it
37. 37.True or false: a mirror is needed for the float-or-sink test. (a) False (b) True
38. 38.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
39. 39.🧺 Do we need ice cubes for the water cycle bowl? (a) needed (b) not needed
40. 40.True or false: a mirror is needed for the dissolving test. (a) True (b) False

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