Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 53 · 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.🔍 You drop a coin into a tub of water. What do you see? (a) it sinks (b) it floats (c) it bounces up (d) it dissolves
2. 2.🧺 Do we need sunlight for the water cycle bowl? (a) needed (b) not needed
3. 3.🧺 Do we need a mirror for the float-or-sink test? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a towel (d) a magnet
5. 5.True or false: a pebble is less dense than water. (a) False (b) True
6. 6.True or false: a paper clip is needed for the paper helicopter. (a) False (b) True
7. 7.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is the one thing we change. (a) False (b) True
8. 8.🔮 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
9. 9.⚖️ 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 same three liquids (b) how much of each liquid (c) the order of the layers (d) the order of pouring
10. 10.⚖️ 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) the time we wait (b) the amount of water (c) sun or shade (d) the cling film cover
11. 11.True or false: a tub of water is needed for the float-or-sink test. (a) False (b) True
12. 12.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) more friction, less far (c) no change at all (d) less friction
13. 13.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) the rainbow fades (c) it turns all red (d) it turns brighter
14. 14.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
15. 15.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is what we measure. (a) True (b) False
16. 16.🚁 Dropped from a raised hand, does a feather fall slowly or fast? (a) falls slowly (b) falls fast
17. 17.🧺 Do we need a comb for the dissolving test? (a) not needed (b) needed
18. 18.🧺 Do we need a balloon for the float-or-sink test? (a) needed (b) not needed
19. 19.🧺 Which of these is not needed for the water cycle bowl? (a) a big bowl (b) a small cup (c) cling film (d) a balloon
20. 20.🎈 Why does the balloon rocket move along the string? (a) the string pulls it (b) the straw is heavy (c) a magnet pulls it (d) escaping air pushes it
21. 21.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) melting (c) capillary action (d) magnetism
22. 22.💧 Which of these is evaporation? (a) sweat drying on skin (b) dew on morning grass (c) butter going runny (d) snow turning to water
23. 23.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) a sheet of white paper (d) a magnet
24. 24.True or false: turmeric powder is not needed for the water cycle bowl. (a) False (b) True
25. 25.🫗 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
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a balloon (d) a glass of water
27. 27.🔮 A big log and a small pebble go into a pond. Which one floats? (a) both of them (b) neither of them (c) the big log (d) the small pebble
28. 28.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a few hours of waiting (d) a white flower
29. 29.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) bright sunlight (c) a balloon (d) a clear glass of water
30. 30.⚖️ 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 change it (b) we measure it (c) we keep it the same
31. 31.⚖️ 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) the same card (b) how full the glass is (c) whether the card stays
32. 32.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
33. 33.🔍 Which is the odd one out? (a) a fluff of cotton (b) a crumpled paper ball (c) a steel spoon (d) a coin
34. 34.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) a paper clip (c) a balloon (d) safety scissors
35. 35.🚁 Which of these falls slowly through the air? (a) a stone (b) a paper helicopter (c) a glass marble (d) a coin
36. 36.🔍 Which is the odd one out? (a) a fluff of cotton (b) an open sheet of paper (c) a stone (d) a toy parachute
37. 37.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) the amount of water (b) how many drops form (c) sun or shade
38. 38.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the amount of water is the one thing we change. (a) True (b) False
39. 39.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a mirror (c) a magnet (d) bright sunlight
40. 40.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb

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