Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 381 · 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.🧺 Do we need a spoon for the density tower? (a) needed (b) not needed
2. 2.True or false: table salt does not dissolve in water. (a) True (b) False
3. 3.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) powdered sugar (b) the sugar cube (c) both the same (d) neither of them
4. 4.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) how much of each liquid (b) the order of pouring (c) the same glass (d) the same three liquids
5. 5.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) cling film (c) ice cubes (d) a magnet
6. 6.True or false: cold water is not needed for the dissolving test. (a) False (b) True
7. 7.True or false: a coin sinks in water. (a) False (b) True
8. 8.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) colour climbs up it (c) nothing ever happens (d) it sinks at once
9. 9.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it sinks faster (b) it dissolves (c) it turns to stone (d) it can float
10. 10.True or false: honey is needed for the density tower. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) making ice lollies (b) a pond icing over (c) water becoming ice (d) drops under a pot lid
12. 12.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
13. 13.🧺 Do we need a mirror for the float-or-sink test? (a) not needed (b) needed
14. 14.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) a balloon (c) a mirror (d) a magnet
15. 15.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a mirror (c) a tall clear glass (d) water with food colour
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.🚁 Which of these falls fast through the air? (a) an open sheet of paper (b) a fluff of cotton (c) a toy parachute (d) a crumpled paper ball
18. 18.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the kind of flower (b) the length of the stem (c) the amount of colour (d) the amount of water
19. 19.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.📘 What does “dense” mean? (a) very hot (b) very thin (c) heavy for its size (d) very colourful
21. 21.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
22. 22.🚁 Which of these falls fast through the air? (a) a fluff of cotton (b) a feather (c) a stone (d) an open sheet of paper
23. 23.⚖️ 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 kept the same. (a) True (b) False
24. 24.⚖️ 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 tub of water (c) the shape of the clay (d) the amount of clay
25. 25.🍯 Which of these is less dense than water? (a) cooking oil (b) a coin (c) a pebble (d) honey
26. 26.🥄 Which of these dissolves in water? (a) sugar (b) small pebbles (c) sand (d) sawdust
27. 27.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) True (b) False
28. 28.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) it changes colour (c) hot water is magnetic (d) hot water can scald
29. 29.🚁 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 magnetic (d) to make it fall slower
30. 30.🔍 Sand is stirred into water. What do you see after a while? (a) it turns blue (b) it dissolves (c) it floats up (d) it settles at the bottom
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 the one thing we change. (a) True (b) False
32. 32.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a few hours of waiting (d) food colour
33. 33.True or false: small test objects is needed for the float-or-sink test. (a) True (b) False
34. 34.🔍 How can you get the salt back from salty water? (a) add more water (b) stir it more (c) let the water evaporate (d) keep it in a fridge
35. 35.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is what we measure. (a) False (b) True
36. 36.⚖️ 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) the same glass (b) whether the card stays (c) the way we turn it (d) how full the glass is
37. 37.True or false: the rocket goes backward. (a) False (b) True
38. 38.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
40. 40.True or false: gas from the rocket goes backward. (a) True (b) False

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