Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 95 · 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.True or false: the rocket goes forward. (a) False (b) True
2. 2.True or false: a clock or timer is not needed for the dissolving test. (a) True (b) False
3. 3.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🍯 Which of these is less dense than water? (a) a pebble (b) honey (c) cooking oil (d) a coin
5. 5.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it gets too heavy (c) it can pop loudly (d) it turns into a kite
6. 6.🧺 Do we need a results table for the float-or-sink test? (a) not needed (b) needed
7. 7.⚖️ 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 keep it the same (c) we change it
8. 8.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it sinks (c) it still floats (d) it turns white
9. 9.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.🔍 Which is the odd one out? (a) a glass marble (b) a metal key (c) a ball of clay (d) a piece of thermocol
11. 11.True or false: a stone falls fast through the air. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) an ice cube (b) a ping-pong ball (c) cooking oil (d) very salty water
13. 13.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🚀 Which of these goes backward? (a) the balloon (b) water a swimmer pushes (c) the swimmer (d) the rocket
15. 15.💧 Which of these lets water climb up it? (a) a steel spoon (b) a plastic ruler (c) a flower stem (d) a piece of foil
16. 16.🔍 Which is the odd one out? (a) a stone (b) a toy parachute (c) a coin (d) a glass marble
17. 17.💧 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
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) True (b) False
19. 19.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: how many drops form is kept the same. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) a bicycle pump (b) a vacuum cleaner (c) a magnetic chess set (d) a drinking straw
21. 21.🧺 Do we need a balloon for the balloon rocket? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a balloon (c) a tall clear glass (d) a spoon
23. 23.🍯 Which of these is denser than water? (a) a cork (b) a ping-pong ball (c) air (d) very salty water
24. 24.True or false: a balloon is needed for the water cycle bowl. (a) False (b) True
25. 25.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes forward (b) goes backward
26. 26.💧 Which change is this: drops under a pot lid? (a) freezing (b) condensation (c) melting (d) evaporation
27. 27.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) never look at the Sun (c) stare at the Sun (d) look at it through glass
28. 28.🧺 Do we need small test objects for the float-or-sink test? (a) not needed (b) needed
29. 29.⚖️ 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 window (b) the amount of water (c) brightness of rainbow
30. 30.True or false: a magnet is not needed for the dissolving test. (a) False (b) True
31. 31.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) time for colour to show (b) the kind of flower (c) the amount of colour (d) the room it stands in
32. 32.🧺 Which of these is needed for the float-or-sink test? (a) a mirror (b) a tub of water (c) a magnet (d) turmeric powder
33. 33.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) taste each layer (c) do not lick the spoon (d) throw the glass
34. 34.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) run around the tub (c) leave water on the floor (d) wipe up spills at once
35. 35.🧺 Do we need a magnet for the float-or-sink test? (a) needed (b) not needed
36. 36.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it turns blue (c) it does not fall (d) it spins the other way
37. 37.🍯 Which of these is less dense than water? (a) a pebble (b) very salty water (c) a glass marble (d) an ice cube
38. 38.True or false: a battery cell is not needed for the paper helicopter. (a) False (b) True
39. 39.True or false: dew on morning grass is condensation. (a) True (b) False
40. 40.🧺 Which of these is not needed for the balloon rocket? (a) a balloon (b) a drinking straw (c) yeast (d) a long string

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