Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 147 · 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.💧 In the covered bowl, where does the water vapour come from? (a) the bowl itself (b) water warmed by the Sun (c) the cling film (d) the air outside
2. 2.🧺 Which of these is not needed for the density tower? (a) water with food colour (b) cooking oil (c) honey (d) a mirror
3. 3.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a bicycle pump (c) a compass needle (d) a fridge magnet
4. 4.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a mirror (c) bright sunlight (d) a sunny window
5. 5.True or false: warm water is needed for the dissolving test. (a) False (b) True
6. 6.⚖️ 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 time of day (b) brightness of rainbow (c) the same glass (d) the amount of water
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is what we measure. (a) False (b) True
8. 8.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
9. 9.True or false: sunlight is not needed for the water cycle bowl. (a) True (b) False
10. 10.🥄 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
11. 11.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
12. 12.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) the stem is hot (c) petals like colour (d) petals are magnetic
13. 13.🔍 How can you get the salt back from salty water? (a) stir it more (b) keep it in a fridge (c) add more water (d) let the water evaporate
14. 14.🔍 Which is the odd one out? (a) table salt (b) cooking oil (c) small pebbles (d) sawdust
15. 15.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) taste each layer (c) throw the glass (d) pour it on the floor
17. 17.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
18. 18.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) more plain water (c) lots of salt stirred in (d) a few ice cubes
19. 19.True or false: a battery cell is not needed for the float-or-sink test. (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 kept the same? (a) the same glass (b) the amount of water (c) brightness of rainbow
21. 21.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a comb (b) warm water (c) a teaspoon (d) a clock or timer
22. 22.🧺 Which of these is needed for the dissolving test? (a) sugar (b) honey (c) a comb (d) a balloon
23. 23.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) water splits the light (c) the water is coloured (d) the paper makes colours
24. 24.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) cling film (c) a battery cell (d) a big bowl
25. 25.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) it changes colour (c) hot water is heavy (d) hot water is magnetic
27. 27.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) yeast (c) cooking oil (d) water with food colour
28. 28.🚁 Which of these falls slowly through the air? (a) a crumpled paper ball (b) a feather (c) a coin (d) a glass marble
29. 29.💧 Which of these is freezing? (a) a pond icing over (b) butter going runny (c) drops on a cold glass (d) dew on morning grass
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) turmeric powder (c) a stiff postcard (d) a mirror
31. 31.🛟 Who should trim the flower stem? (a) a toddler (b) anyone, without looking (c) a grown-up (d) a pet
32. 32.🛟 Does a coin float or sink in water? (a) sinks (b) floats
33. 33.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.True or false: a battery cell is needed for the density tower. (a) False (b) True
35. 35.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) the same tape (b) distance it travels (c) how big we blow it
36. 36.💧 Which change is this: a puddle drying up? (a) condensation (b) freezing (c) evaporation (d) melting
37. 37.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
38. 38.🛟 Which of these floats on water? (a) a pebble (b) a steel spoon (c) a ball of clay (d) an ice cube
39. 39.💧 Which of these is melting? (a) making ice lollies (b) ice becoming water (c) water becoming ice (d) drops on a cold glass
40. 40.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) a tub of water (c) small test objects (d) a results table

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