Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 503 · 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.💧 Which of these is evaporation? (a) dew on morning grass (b) drops on a cold glass (c) wet clothes drying (d) ice becoming water
2. 2.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) brightness of rainbow (c) the same glass
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) turmeric powder
4. 4.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a magnet (b) honey (c) a tall clear glass (d) water with food colour
5. 5.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) honey (c) a tall clear glass (d) turmeric powder
7. 7.💧 Which change is this: snow turning to water? (a) freezing (b) condensation (c) evaporation (d) melting
8. 8.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a balloon (b) water (c) a big bowl (d) ice cubes
9. 9.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) more drops form (b) the water turns red (c) fewer drops form (d) the bowl freezes
10. 10.🧺 Do we need yeast for the water cycle bowl? (a) not needed (b) needed
11. 11.True or false: water from the oars goes backward. (a) True (b) False
12. 12.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.True or false: a magnet is needed for the water rainbow. (a) False (b) True
14. 14.🚀 Which of these goes forward? (a) the rocket (b) water from the oars (c) air from the balloon (d) gas from the rocket
15. 15.🚁 Why does the paper helicopter fall slowly? (a) a magnet holds it (b) it has no weight (c) the floor pushes it (d) air pushes on its blades
16. 16.💧 Which of these does not let water climb? (a) a piece of chalk (b) a flower stem (c) a steel spoon (d) a strip of cloth
17. 17.🔍 Which layer is on top in the honey-water-oil tower? (a) coloured water (b) honey (c) cooking oil (d) the spoon
18. 18.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) False (b) True
19. 19.💧 Which of these lets water climb up it? (a) a piece of foil (b) a glass marble (c) a steel spoon (d) a paper towel
20. 20.🥄 Which of these dissolves in water? (a) sand (b) sawdust (c) sugar (d) small pebbles
21. 21.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) yeast (c) a drinking straw (d) two chairs
22. 22.🔮 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) it turns to salt (d) some water evaporates
23. 23.True or false: gas from the rocket goes backward. (a) False (b) True
24. 24.🌈 In VIBGYOR, what number colour is violet?
25. 25.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we change it (c) we measure it
26. 26.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) pour more water (c) leave them wet (d) wipe them dry
27. 27.⚖️ 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 way we turn it (b) how full the glass is (c) whether the card stays
28. 28.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) the water turns solid (c) some stays undissolved (d) the sugar turns to salt
29. 29.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.True or false: sweat drying on skin is evaporation. (a) True (b) False
31. 31.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) a pencil (c) yeast (d) safety scissors
32. 32.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) the same string (c) how big we blow it
33. 33.True or false: yeast is not needed for the paper helicopter. (a) True (b) False
34. 34.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the amount of clay (b) the shape of the clay (c) whether it floats
35. 35.True or false: gas from the rocket goes forward. (a) False (b) True
36. 36.🧺 Do we need turmeric powder for the float-or-sink test? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a spoon (c) a battery cell (d) a tall clear glass
38. 38.🧺 Which of these is needed for the paper helicopter? (a) a battery cell (b) yeast (c) a balloon (d) safety scissors
39. 39.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the small pebble (b) the big log (c) neither of them (d) both of them
40. 40.True or false: a fluff of cotton falls slowly through the air. (a) False (b) True

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