Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 87 · 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.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is what we measure. (a) True (b) False
2. 2.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) faster (c) it floats up (d) it stops in the air
3. 3.🥄 Which of these dissolves in water? (a) sand (b) sawdust (c) sugar (d) chalk powder
4. 4.🔮 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
5. 5.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) fewer drops form (b) the water turns red (c) more drops form (d) the bowl freezes
6. 6.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) a battery cell
7. 7.💧 Which of these is condensation? (a) sweat drying on skin (b) snow turning to water (c) a misty bathroom mirror (d) wet clothes drying
8. 8.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is heavier (c) oil is hot (d) oil is less dense
9. 9.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
10. 10.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) yeast (c) small test objects (d) a results table
11. 11.True or false: a suction hook works by magnetism. (a) False (b) True
12. 12.🧺 Which of these is needed for the dissolving test? (a) honey (b) a balloon (c) a comb (d) a clock or timer
13. 13.🧊 Why does an ice cube float on water? (a) ice is very cold (b) ice is magnetic (c) ice is less dense (d) water is sticky
14. 14.🧺 Do we need yeast for the float-or-sink test? (a) needed (b) not needed
15. 15.🚁 Dropped from a raised hand, does a glass marble fall slowly or fast? (a) falls fast (b) falls slowly
16. 16.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) a magnet (c) sticky tape (d) a balloon
17. 17.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a balloon rocket (b) a sundial (c) a fridge magnet (d) a mirror
18. 18.💧 In the covered bowl, where does the water vapour come from? (a) the air outside (b) the cling film (c) water warmed by the Sun (d) the bowl itself
19. 19.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a magnetic pin holder (d) a medicine dropper
20. 20.True or false: drops on a cold glass is freezing. (a) False (b) True
21. 21.🍯 Which of these is denser than water? (a) honey (b) cooking oil (c) a ping-pong ball (d) a cork
22. 22.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) air pressure (d) magnetism
23. 23.🔍 Which is the odd one out? (a) a stone (b) a toy parachute (c) a glass marble (d) a crumpled paper ball
24. 24.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
25. 25.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a balloon (c) water with food colour (d) cooking oil
26. 26.🧺 Which of these is not needed for the balloon rocket? (a) sticky tape (b) yeast (c) a balloon (d) a drinking straw
27. 27.🧺 Which of these is needed for the density tower? (a) yeast (b) water with food colour (c) a battery cell (d) turmeric powder
28. 28.True or false: a puddle drying up is melting. (a) False (b) True
29. 29.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
30. 30.🧺 Which of these is needed for the paper helicopter? (a) a battery cell (b) a balloon (c) a pencil (d) yeast
31. 31.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) no change at all (c) more friction, less far (d) less friction
32. 32.True or false: sugar in warm water dissolves slower. (a) True (b) False
33. 33.🧺 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
34. 34.True or false: food colour dissolves in water. (a) True (b) False
35. 35.True or false: a battery cell is not needed for the balloon rocket. (a) True (b) False
36. 36.🥄 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
37. 37.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) capillary action (c) melting (d) magnetism
38. 38.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) magnets (d) clouds
39. 39.True or false: honey is not needed for the density tower. (a) True (b) False
40. 40.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids