Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 505 · 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 melting? (a) dew on morning grass (b) drops under a pot lid (c) wet hair drying (d) butter going runny
2. 2.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) the water increases (c) some water evaporates (d) it turns to ice
3. 3.🧺 Which of these is not needed for the paper helicopter? (a) a pencil (b) a ruler (c) a strip of paper (d) a magnet
4. 4.💧 Which of these is evaporation? (a) a puddle drying up (b) dew on morning grass (c) a pond icing over (d) making ice lollies
5. 5.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) yeast (b) a long string (c) sticky tape (d) a balloon
6. 6.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a coin (c) an open sheet of paper (d) a stone
7. 7.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
8. 8.⚖️ 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 room it stands in (b) time for colour to show (c) the length of the stem
9. 9.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🧺 Which of these is needed for the density tower? (a) a mirror (b) a magnet (c) a spoon (d) a balloon
11. 11.🚀 Which of these goes forward? (a) gas from the rocket (b) the rocket (c) water a swimmer pushes (d) air from the balloon
12. 12.🛟 Who should pour the warm water in the dissolving test? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
13. 13.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the glass breaks (d) the water turns to ice
14. 14.🧺 Which of these is not needed for the density tower? (a) a spoon (b) a tall clear glass (c) honey (d) a battery cell
15. 15.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the amount of water (b) the same window (c) the same white paper (d) the same glass
16. 16.🧺 Which of these is needed for the float-or-sink test? (a) a mirror (b) a towel for spills (c) a magnet (d) a battery cell
17. 17.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
18. 18.🍯 Which of these is less dense than water? (a) very salty water (b) honey (c) a glass marble (d) a cork
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) True (b) False
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) the amount of water (b) brightness of rainbow (c) the same window (d) the time of day
21. 21.True or false: a clear glass of water is not needed for the water rainbow. (a) True (b) False
22. 22.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) turmeric powder (b) a white flower (c) a few hours of waiting (d) food colour
23. 23.🧺 Which of these is not needed for the density tower? (a) a balloon (b) a tall clear glass (c) a spoon (d) cooking oil
24. 24.💧 Which change is this: drops on a cold glass? (a) melting (b) evaporation (c) condensation (d) freezing
25. 25.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same string (b) the same straw (c) distance it travels (d) the same tape
26. 26.True or false: baking soda dissolves in water. (a) True (b) False
27. 27.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
28. 28.🥄 Does sugar in warm water dissolve faster or slower? (a) slower (b) faster
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.💧 Which of these is condensation? (a) drops under a pot lid (b) snow turning to water (c) a pond icing over (d) butter going runny
31. 31.🎈 When does the balloon rocket stop? (a) when it turns blue (b) it never stops (c) when the air runs out (d) when it gets cold
32. 32.🛟 Which of these floats on water? (a) a metal key (b) a coin (c) a glass marble (d) a cork
33. 33.True or false: table salt does not dissolve in water. (a) True (b) False
34. 34.⚖️ 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 same three liquids”? (a) we change it (b) we measure it (c) we keep it the same
35. 35.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
37. 37.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they separate again (c) they become solid (d) they mix for ever
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same glass (b) the way we turn it (c) whether the card stays (d) how full the glass is
39. 39.⚖️ 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) False (b) True
40. 40.True or false: a compass needle works by magnetism. (a) False (b) True

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