Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 794 · 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 is needed for the balloon rocket? (a) a mirror (b) turmeric powder (c) sticky tape (d) a battery cell
2. 2.🚀 Which of these goes forward? (a) water a swimmer pushes (b) water from the oars (c) the rocket (d) air from the balloon
3. 3.🚁 Dropped from a raised hand, does a steel spoon fall slowly or fast? (a) falls fast (b) falls slowly
4. 4.True or false: ice becoming water is melting. (a) True (b) False
5. 5.🧺 Which of these is needed for the dissolving test? (a) a mirror (b) a comb (c) cold water (d) a balloon
6. 6.🧺 Do we need a magnet for the balloon rocket? (a) not needed (b) needed
7. 7.🛟 Which scissors should children use to cut the paper? (a) sharp kitchen shears (b) a paper cutter (c) gardening shears (d) safety scissors
8. 8.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “how many drops form”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🧺 Do we need water with food colour for the density tower? (a) needed (b) not needed
10. 10.🍯 Is a glass marble denser or less dense than water? (a) denser than water (b) less dense than water
11. 11.⚖️ 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 amount of water (b) brightness of rainbow (c) the same white paper
12. 12.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) orange (c) yellow (d) violet
13. 13.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
14. 14.True or false: a compass needle works by air pressure. (a) True (b) False
15. 15.🧺 Which of these is not needed for the density tower? (a) a spoon (b) cooking oil (c) turmeric powder (d) honey
16. 16.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) pour it on the floor (c) throw the glass (d) do not lick the spoon
17. 17.🌈 How many colours do we name in a rainbow (VIBGYOR)?
18. 18.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a balloon (b) a tall clear glass (c) cooking oil (d) water with food colour
19. 19.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.True or false: glucose powder dissolves in water. (a) True (b) False
21. 21.🧺 Do we need a mirror for the density tower? (a) needed (b) not needed
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.🧺 Do we need a ruler for the paper helicopter? (a) needed (b) not needed
24. 24.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) play near a deep pond (c) leave water on the floor (d) wipe up spills at once
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) True (b) False
26. 26.🧺 Which of these is needed for the density tower? (a) a magnet (b) turmeric powder (c) cooking oil (d) a balloon
27. 27.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) cooking oil (c) water with food colour (d) yeast
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) turmeric powder
29. 29.💧 Which of these is freezing? (a) water becoming ice (b) drops under a pot lid (c) ice becoming water (d) drops on a cold glass
30. 30.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) yeast
32. 32.🌈 In VIBGYOR, what number colour is violet?
33. 33.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
34. 34.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) sunshine (b) lightning (c) rain (d) wind
36. 36.🛟 Which of these floats on water? (a) a steel spoon (b) a metal key (c) an iron nail (d) an ice cube
37. 37.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a toddler (c) a grown-up (d) a pet
38. 38.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes forward (b) goes backward
39. 39.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is the one thing we change. (a) False (b) True
40. 40.True or false: a coin falls fast through the air. (a) False (b) True

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