Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 341 · 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.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to win a prize (c) to splash everyone (d) to keep children safe
2. 2.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
3. 3.🍯 Is air denser or less dense than water? (a) less dense than water (b) denser than water
4. 4.🧺 Do we need a magnet for the paper helicopter? (a) not needed (b) needed
5. 5.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it can pop loudly (c) it changes colour (d) it turns into a kite
6. 6.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
7. 7.🧺 Do we need a magnet for the dissolving test? (a) needed (b) not needed
8. 8.🚀 Which of these goes backward? (a) the swimmer (b) the balloon (c) air from the balloon (d) the rowing boat
9. 9.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a tall clear glass (c) honey (d) yeast
10. 10.🥄 Does a big sugar cube dissolve faster or slower? (a) slower (b) faster
11. 11.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is what we measure. (a) False (b) True
12. 12.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) turmeric powder (c) water with food colour (d) a spoon
13. 13.True or false: a ping-pong ball is denser than water. (a) False (b) True
14. 14.True or false: a balloon is not needed for the balloon rocket. (a) True (b) False
15. 15.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is the one thing we change. (a) True (b) False
16. 16.🧺 Do we need cling film for the water cycle bowl? (a) not needed (b) needed
17. 17.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a suction hook
18. 18.🔍 Which is the odd one out? (a) an ice cube (b) a metal key (c) a steel spoon (d) a glass marble
19. 19.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it sinks (c) it turns white (d) it still floats
20. 20.🥄 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) food colour (d) sugar
21. 21.🥄 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.True or false: a magnet is not needed for the balloon rocket. (a) False (b) True
23. 23.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they separate again (b) they become solid (c) they turn to honey (d) they mix for ever
24. 24.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is what we measure. (a) False (b) True
25. 25.🧺 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) a sunny window (d) a battery cell
26. 26.🌈 How many colours do we name in a rainbow (VIBGYOR)?
27. 27.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a paper clip (c) a battery cell (d) a strip of paper
28. 28.🔍 Which is the odd one out? (a) a cork (b) an ice cube (c) a glass marble (d) air
29. 29.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) magnetism (c) melting (d) capillary action
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is kept the same. (a) True (b) False
31. 31.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) the stem is hot (c) petals are magnetic (d) petals lose water to air
32. 32.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a mirror (b) water with food colour (c) cooking oil (d) a tall clear glass
34. 34.🧺 Do we need a pencil for the paper helicopter? (a) needed (b) not needed
35. 35.🍯 Is a ping-pong ball denser or less dense than water? (a) denser than water (b) less dense than water
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is the one thing we change. (a) True (b) False
37. 37.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is kept the same. (a) False (b) True
38. 38.⚖️ 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 change it (b) we keep it the same (c) we measure it
39. 39.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil makes it rain (c) spilled oil is slippery (d) oil attracts magnets
40. 40.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) more friction, less far (c) less friction (d) it goes faster

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