Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 272 · 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 sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
2. 2.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is kept the same. (a) True (b) False
3. 3.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the petals turn bluish (c) the water turns green (d) the stem turns to ice
4. 4.🛟 How should you check if the sugar has dissolved? (a) smell it closely (b) taste it (c) look for leftover grains (d) poke it with a finger
5. 5.🧺 Do we need a magnet for the dissolving test? (a) needed (b) not needed
6. 6.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is kept the same. (a) True (b) False
7. 7.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) it stays still (b) straight down (c) forward (d) backward
8. 8.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is sticky (c) oil is heavier (d) oil is less dense
9. 9.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
10. 10.🍯 Is honey denser or less dense than water? (a) less dense than water (b) denser than water
11. 11.⚖️ 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 amount of water (b) the same white paper (c) the time of day (d) the same glass
12. 12.True or false: a medicine dropper works by air pressure. (a) True (b) False
13. 13.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) a paper clip (c) turmeric powder (d) a strip of paper
14. 14.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) a results table (d) turmeric powder
15. 15.📘 What is the push of air on a falling thing called? (a) air resistance (b) floating (c) magnetism (d) dissolving
16. 16.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is the one thing we change. (a) False (b) True
17. 17.🔮 Predict: the string slopes uphill. What happens? (a) it speeds up (b) it goes backward first (c) it travels farther (d) it travels less far
18. 18.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
19. 19.True or false: turmeric powder is not needed for the water cycle bowl. (a) False (b) True
20. 20.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
21. 21.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a mirror (c) a clear glass of water (d) bright sunlight
22. 22.True or false: baking soda does not dissolve in water. (a) False (b) True
23. 23.True or false: the balloon goes backward. (a) False (b) True
24. 24.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar stirred well (c) sugar in warm water (d) a big sugar cube
25. 25.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
26. 26.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns all red (c) it turns brighter (d) it floats away
27. 27.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) a battery cell (d) a sunny window
28. 28.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) how much of each liquid (b) the order of pouring (c) the same glass (d) the same three liquids
29. 29.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls slowly (b) falls fast
30. 30.🍯 Why does honey sink to the bottom of the glass? (a) it is the densest (b) it is yellow (c) it is the coldest (d) it is the stickiest
31. 31.True or false: a mirror is needed for the water rainbow. (a) True (b) False
32. 32.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) capillary action (c) magnetism (d) melting
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a towel (c) a glass of water (d) a sink or a bucket
34. 34.🍯 Is a glass marble denser or less dense than water? (a) denser than water (b) less dense than water
35. 35.True or false: a clear glass of water is not needed for the water rainbow. (a) False (b) True
36. 36.⚖️ 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) False (b) True
37. 37.🥄 Which of these dissolves faster? (a) sugar in icy water (b) sugar in warm water (c) sugar left unstirred (d) a big sugar cube
38. 38.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is what we measure. (a) False (b) True
39. 39.🚁 Dropped from a raised hand, does a feather fall slowly or fast? (a) falls fast (b) falls slowly
40. 40.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) do not lick the spoon (c) throw the glass (d) pour it on the floor

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