Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 493 · 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.🔮 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
2. 2.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is kept the same. (a) False (b) True
3. 3.🧺 Do we need yeast for the paper helicopter? (a) needed (b) not needed
4. 4.⚖️ 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) False (b) True
5. 5.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
6. 6.🧺 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 stiff postcard (c) a towel (d) a mirror
7. 7.True or false: a cork is denser than water. (a) False (b) True
8. 8.True or false: a glass marble lets water climb up it. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) making ice lollies (b) a pond icing over (c) water becoming ice (d) dew on morning grass
10. 10.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a balloon (c) a tub of water (d) small test objects
12. 12.🧺 Which of these is not needed for the float-or-sink test? (a) a results table (b) a tub of water (c) yeast (d) a towel for spills
13. 13.💧 Why do water drops form on the outside of a glass of ice water? (a) ice escapes the glass (b) the glass sweats (c) vapour in air cools (d) the glass leaks
14. 14.🚁 Which of these falls fast through the air? (a) a feather (b) a paper helicopter (c) a stone (d) a fluff of cotton
15. 15.🔍 Which is the odd one out? (a) a cotton thread (b) a flower stem (c) a plastic ruler (d) a strip of cloth
16. 16.🚀 Which of these goes backward? (a) the balloon (b) the rowing boat (c) water from the oars (d) the rocket
17. 17.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is what we measure. (a) True (b) False
18. 18.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
19. 19.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they never dry (b) they turn to ice (c) slower (d) faster
20. 20.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is the one thing we change. (a) True (b) False
21. 21.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a balloon (d) a clear glass of water
22. 22.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) some stays undissolved (c) the sugar turns to salt (d) the water turns solid
23. 23.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) food colour (d) a few hours of waiting
24. 24.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a comb (b) warm water (c) sugar (d) a teaspoon
25. 25.True or false: a clock or timer is not needed for the dissolving test. (a) False (b) True
26. 26.True or false: cooking oil is not needed for the density tower. (a) False (b) True
27. 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the kind of clay (b) the shape of the clay (c) whether it floats
28. 28.⚖️ 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 same window (b) brightness of rainbow (c) the time of day (d) the amount of water
29. 29.True or false: cooking oil is less dense than water. (a) False (b) True
30. 30.🌈 In VIBGYOR, what number colour is red?
31. 31.True or false: sugar dissolves in water. (a) False (b) True
32. 32.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to cool the glass (d) to catch any spills
33. 33.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a bicycle pump (d) a medicine dropper
34. 34.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it dissolves (c) it still floats (d) it sinks
35. 35.💧 Which change is this: drops on a cold glass? (a) condensation (b) evaporation (c) melting (d) freezing
36. 36.⚖️ 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) the size of the bowl (b) the time we wait (c) how many drops form (d) the cling film cover
37. 37.True or false: a spoon is needed for the density tower. (a) True (b) False
38. 38.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
39. 39.🔍 Which is the odd one out? (a) drops on a cold glass (b) snow turning to water (c) dew on morning grass (d) drops under a pot lid
40. 40.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it

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