Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 307 · 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.True or false: the swimmer goes forward. (a) True (b) False
2. 2.🛟 Does a pebble float or sink in water? (a) sinks (b) floats
3. 3.⚖️ 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 kind of clay (b) the tub of water (c) the shape of the clay (d) whether it floats
4. 4.💧 Which change is this: wet hair drying? (a) evaporation (b) melting (c) freezing (d) condensation
5. 5.🛟 What should you do with popped balloon pieces? (a) keep them in your mouth (b) chew them (c) give them to a baby (d) throw them away safely
6. 6.🍯 Which of these is less dense than water? (a) a pebble (b) a glass marble (c) very salty water (d) an ice cube
7. 7.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a battery cell (c) bright sunlight (d) a mirror
8. 8.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) a towel (d) a stiff postcard
10. 10.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
11. 11.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) True (b) False
12. 12.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the amount of water (b) the amount of sugar (c) the water temperature (d) time to dissolve
13. 13.🔍 Which is the odd one out? (a) a sugar cube (b) a plastic ruler (c) a paper towel (d) a cotton thread
14. 14.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the tub of water (b) whether it floats (c) the kind of clay (d) the shape of the clay
15. 15.🛟 Does a cork float or sink in water? (a) floats (b) sinks
16. 16.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is the one thing we change. (a) True (b) False
17. 17.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) wipe up spills at once (c) leave water on the floor (d) run around the tub
18. 18.🧺 Do we need a balloon for the water cycle bowl? (a) needed (b) not needed
19. 19.True or false: a ping-pong ball is denser than water. (a) False (b) True
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) brightness of rainbow (b) the same white paper (c) the same window (d) the amount of water
21. 21.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) the water increases (b) it turns to ice (c) some water evaporates (d) it turns to salt
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is the one thing we change. (a) True (b) False
23. 23.🥄 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a sunny window (c) turmeric powder (d) a magnet
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we change it (b) we keep it the same (c) we measure it
26. 26.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the honey layer (c) in the water layer (d) on top of the oil
27. 27.🧺 Which of these is not needed for the water rainbow? (a) turmeric powder (b) a sheet of white paper (c) a sunny window (d) bright sunlight
28. 28.🥄 Does a big sugar cube dissolve faster or slower? (a) faster (b) slower
29. 29.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is kept the same. (a) False (b) True
30. 30.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) how many drops form (b) the cling film cover (c) sun or shade (d) the time we wait
31. 31.🛟 Which is a safe rule for the balloon rocket? (a) aim it at your friend (b) put string round a neck (c) blow it till it bursts (d) keep it away from faces
32. 32.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.True or false: a strip of cloth lets water climb up it. (a) False (b) True
34. 34.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is heavier (c) oil is sticky (d) oil is less dense
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) True (b) False
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) True (b) False
37. 37.🧺 Do we need safety scissors for the paper helicopter? (a) not needed (b) needed
38. 38.🎈 Why does the balloon rocket move along the string? (a) the string pulls it (b) the straw is heavy (c) escaping air pushes it (d) a magnet pulls it
39. 39.True or false: a mirror is needed for the paper helicopter. (a) True (b) False
40. 40.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) at the very bottom (b) in the oil layer (c) in the water layer (d) on top of the oil

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