Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 312 · 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 colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) True (b) False
2. 2.True or false: a clock or timer is needed for the dissolving test. (a) True (b) False
3. 3.⚖️ 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 same glass (d) the amount of water
4. 4.🍯 Is cooking oil denser or less dense than water? (a) denser than water (b) less dense than water
5. 5.True or false: a towel for spills is not needed for the float-or-sink test. (a) False (b) True
6. 6.🧺 Which of these is needed for the density tower? (a) turmeric powder (b) a battery cell (c) a mirror (d) cooking oil
7. 7.🚀 In “push back, move forward”, which way does the rocket go? (a) goes forward (b) goes backward
8. 8.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it floats away (c) the rainbow fades (d) it turns all red
9. 9.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same straw (b) distance it travels (c) the slope of the string (d) the same tape
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.📘 What does “dense” mean? (a) very colourful (b) very hot (c) very thin (d) heavy for its size
12. 12.True or false: the swimmer goes forward. (a) True (b) False
13. 13.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) prisms (c) balloons (d) magnets
14. 14.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
15. 15.🌈 How many colours do we name in a rainbow (VIBGYOR)?
16. 16.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) sticky tape (c) two chairs (d) a mirror
17. 17.🧺 Which of these is needed for the paper helicopter? (a) a battery cell (b) a strip of paper (c) a magnet (d) a mirror
18. 18.⚖️ 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 same window (b) the same glass (c) brightness of rainbow (d) the amount of water
19. 19.💧 Which change is this: snow turning to water? (a) evaporation (b) freezing (c) condensation (d) melting
20. 20.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
21. 21.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) two clear glasses (c) a balloon (d) warm water
22. 22.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) juice likes plastic (d) air pushes it up
23. 23.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) how much of each liquid (b) the same three liquids (c) the order of the layers (d) the same glass
24. 24.🥄 Why does sugar dissolve faster in warm water? (a) cold water is wet (b) warm water is thicker (c) sugar likes the dark (d) particles move faster
25. 25.🧺 Do we need water for the water cycle bowl? (a) not needed (b) needed
26. 26.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
27. 27.True or false: cold water is needed for the dissolving test. (a) False (b) True
28. 28.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a glass marble (c) a cotton thread (d) a steel spoon
29. 29.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a battery cell (c) turmeric powder (d) a sheet of white paper
30. 30.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes forward (b) goes backward
31. 31.True or false: a suction hook works by air pressure. (a) True (b) False
32. 32.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a results table (c) a towel for spills (d) a magnet
33. 33.🛟 How should you check if the sugar has dissolved? (a) taste it (b) look for leftover grains (c) smell it closely (d) poke it with a finger
34. 34.🧺 Which of these is not needed for the density tower? (a) honey (b) water with food colour (c) a tall clear glass (d) turmeric powder
35. 35.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) a mirror (c) two chairs (d) sticky tape
36. 36.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a few hours of waiting (c) yeast (d) a white flower
37. 37.🧺 Do we need a balloon for the balloon rocket? (a) needed (b) not needed
38. 38.🧺 Do we need a long string for the balloon rocket? (a) not needed (b) needed
39. 39.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
40. 40.🛟 Which scissors should children use to cut the paper? (a) sharp kitchen shears (b) safety scissors (c) a paper cutter (d) gardening shears

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