Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 43 · 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 — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of pouring”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.True or false: water with food colour is not needed for the density tower. (a) False (b) True
3. 3.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is hot (c) oil is sticky (d) oil is less dense
4. 4.True or false: a balloon is not needed for the water cycle bowl. (a) False (b) True
5. 5.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) evaporation (c) capillary action (d) magnetism
6. 6.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a towel for spills (c) a tub of water (d) a magnet
7. 7.🚁 Which of these falls slowly through the air? (a) a steel spoon (b) a glass marble (c) a stone (d) a fluff of cotton
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a sink or a bucket (c) a balloon (d) a mirror
9. 9.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the length of the stem (b) time for colour to show (c) the amount of colour
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) True (b) False
11. 11.🛟 What should you do with popped balloon pieces? (a) give them to a baby (b) throw them away safely (c) keep them in your mouth (d) chew them
12. 12.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.True or false: a small cup is not needed for the water cycle bowl. (a) False (b) True
14. 14.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
15. 15.🌊 What pushes a floating cork upward? (a) the water (b) the air above (c) the cork itself (d) the tub
16. 16.True or false: table salt dissolves in water. (a) True (b) False
17. 17.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is what we measure. (a) False (b) True
18. 18.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) play near a deep pond (c) wipe up spills at once (d) run around the tub
19. 19.💧 Which change is this: dew on morning grass? (a) melting (b) evaporation (c) freezing (d) condensation
20. 20.🔍 Which is the odd one out? (a) an ice cube (b) a coin (c) a piece of thermocol (d) an ice-cream stick
21. 21.🎈 What is the job of the straw on the string? (a) it holds water (b) it blows air in (c) it guides the balloon (d) it makes it heavier
22. 22.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) some stays undissolved (b) the sugar turns to salt (c) all of it dissolves (d) the water turns solid
23. 23.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) cooking oil (d) baking soda
26. 26.True or false: sugar stirred well dissolves faster. (a) True (b) False
27. 27.🧺 Do we need a mirror for the paper helicopter? (a) needed (b) not needed
28. 28.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “how many drops form”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.⚖️ 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 cling film cover (c) the amount of water (d) the size of the bowl
30. 30.⚖️ 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) how full the glass is (b) the same card (c) whether the card stays
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
32. 32.True or false: the rowing boat goes backward. (a) True (b) False
33. 33.⚖️ 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 kind of clay (c) the shape of the clay (d) whether it floats
34. 34.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) water is heavier (d) little air left inside
35. 35.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is the one thing we change. (a) False (b) True
36. 36.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
37. 37.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is kept the same. (a) False (b) True
38. 38.⚖️ 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) False (b) True
39. 39.🧺 Do we need yeast for the balloon rocket? (a) needed (b) not needed
40. 40.🥄 Does a big sugar cube dissolve faster or slower? (a) faster (b) slower

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