Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 414 · 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.🔮 Predict: the string slopes uphill. What happens? (a) it goes backward first (b) it travels farther (c) it speeds up (d) it travels less far
2. 2.🔍 Which is the odd one out? (a) a coin (b) a ping-pong ball (c) an empty capped bottle (d) a piece of thermocol
3. 3.🍯 Which of these is denser than water? (a) an ice cube (b) a coin (c) cooking oil (d) air
4. 4.💧 Which of these is freezing? (a) dew on morning grass (b) a pond icing over (c) butter going runny (d) snow turning to water
5. 5.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it spread in the water (b) it became air (c) it vanished for ever (d) it sank as sand
6. 6.True or false: a piece of chalk does not let water climb. (a) True (b) False
7. 7.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) lightning (b) sunshine (c) rain (d) wind
8. 8.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of pouring (b) the same three liquids (c) how much of each liquid (d) the order of the layers
9. 9.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water is heavy (c) hot water can scald (d) hot water is magnetic
10. 10.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) the flower glows (c) no colour change (d) the stem turns blue
11. 11.🛟 Which is a safe rule for the balloon rocket? (a) aim it at your friend (b) blow it till it bursts (c) put string round a neck (d) keep it away from faces
12. 12.🔍 Which is the odd one out? (a) a steel spoon (b) an iron nail (c) a ball of clay (d) a dry leaf
13. 13.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.💧 Which of these does not let water climb? (a) a paper towel (b) a cotton thread (c) a plastic ruler (d) a piece of chalk
16. 16.True or false: honey is not needed for the dissolving test. (a) False (b) True
17. 17.True or false: a mirror is needed for the density tower. (a) True (b) False
18. 18.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the water turns to ice (d) the glass breaks
19. 19.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) False (b) True
20. 20.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is the one thing we change. (a) False (b) True
21. 21.True or false: a white flower is not needed for the coloured flower experiment. (a) False (b) True
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the way we turn it (b) the same card (c) the same glass (d) whether the card stays
23. 23.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a magnet (b) a clear glass of water (c) a sheet of white paper (d) bright sunlight
24. 24.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to cool the glass (d) to make it rain
25. 25.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a spoon (c) honey (d) yeast
26. 26.🔍 Which is the odd one out? (a) a puddle drying up (b) wet hair drying (c) sweat drying on skin (d) butter going runny
27. 27.💧 Which change is this: a puddle drying up? (a) condensation (b) freezing (c) melting (d) evaporation
28. 28.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the person dropping (b) time to reach the floor (c) the drop height (d) the length of the blades
29. 29.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) do not lick the spoon (c) pour it on the floor (d) throw the glass
30. 30.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
31. 31.⚖️ 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 kept the same. (a) False (b) True
32. 32.🧺 Which of these is needed for the float-or-sink test? (a) a battery cell (b) a magnet (c) turmeric powder (d) a tub of water
33. 33.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to weigh down the bottom (b) to stop the spinning (c) to make it fall slower (d) to make it magnetic
34. 34.🧺 Do we need a magnet for the balloon rocket? (a) needed (b) not needed
35. 35.True or false: a strip of paper is needed for the paper helicopter. (a) True (b) False
36. 36.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is kept the same. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a magnetic chess set (d) a bicycle pump
39. 39.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
40. 40.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the honey layer (b) on top of the oil (c) under the honey (d) in the water layer

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