Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 308 · 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 sinks in water? (a) a steel spoon (b) a cork (c) an empty capped bottle (d) a ping-pong ball
2. 2.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is the one thing we change. (a) False (b) True
4. 4.True or false: an ice cube floats on water. (a) True (b) False
5. 5.True or false: a balloon is needed for the float-or-sink test. (a) False (b) True
6. 6.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a white flower (c) a magnet (d) a glass of water
7. 7.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a battery cell (c) cooking oil (d) honey
8. 8.🌈 How many colours do we name in a rainbow (VIBGYOR)?
9. 9.⚖️ 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 time of day (b) the amount of water (c) brightness of rainbow (d) the same window
10. 10.⚖️ 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 what we measure. (a) False (b) True
11. 11.🧺 Which of these is needed for the balloon rocket? (a) a magnet (b) vinegar (c) a mirror (d) sticky tape
12. 12.True or false: a pebble floats on water. (a) True (b) False
13. 13.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a magnet (c) a tub of water (d) a towel for spills
14. 14.🔍 Which is the odd one out? (a) an ice cube (b) a cork (c) an ice-cream stick (d) a steel spoon
15. 15.🚀 Which of these goes forward? (a) water from the oars (b) air from the balloon (c) the balloon (d) gas from the rocket
16. 16.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a white flower (c) a battery cell (d) food colour
17. 17.🔍 How can you get the salt back from salty water? (a) stir it more (b) let the water evaporate (c) keep it in a fridge (d) add more water
18. 18.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.True or false: a balloon is needed for the water rainbow. (a) False (b) True
20. 20.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a few hours of waiting (c) a magnet (d) a mirror
21. 21.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) a drinking straw (c) a battery cell (d) sticky tape
22. 22.True or false: a comb is needed for the dissolving test. (a) True (b) False
23. 23.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) sand (d) small pebbles
24. 24.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) colour climbs up it (c) nothing ever happens (d) it sinks at once
25. 25.True or false: yeast is needed for the float-or-sink test. (a) True (b) False
26. 26.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🧺 Which of these is not needed for the dissolving test? (a) two clear glasses (b) cold water (c) a magnet (d) a clock or timer
28. 28.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
29. 29.True or false: a battery cell is not needed for the water cycle bowl. (a) False (b) True
30. 30.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes forward (b) goes backward
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) False (b) True
32. 32.🔮 Predict: you add two more paper clips. How does it fall? (a) faster (b) it stops in the air (c) it floats up (d) slower
33. 33.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
34. 34.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.📘 What does “dense” mean? (a) heavy for its size (b) very thin (c) very colourful (d) very hot
36. 36.🧺 Which of these is needed for the water cycle bowl? (a) a mirror (b) a battery cell (c) a big bowl (d) a balloon
37. 37.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) the water turns red (c) more drops form (d) fewer drops form
38. 38.⚖️ 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 amount of water (b) time for colour to show (c) the length of the stem
39. 39.🧺 Which of these is not needed for the coloured flower experiment? (a) a balloon (b) a glass of water (c) food colour (d) a white flower
40. 40.🔍 Which is the odd one out? (a) water becoming ice (b) making ice lollies (c) a pond icing over (d) ice becoming water

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