Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 861 · 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.True or false: turmeric powder is needed for the density tower. (a) False (b) True
2. 2.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the flower floats away (c) the water turns green (d) the petals turn bluish
3. 3.⚖️ 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 the one thing we change. (a) True (b) False
4. 4.True or false: safety scissors is needed for the paper helicopter. (a) True (b) False
5. 5.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) a sheet of white paper (c) a clear glass of water (d) a sunny window
6. 6.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.⚖️ 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 length of the stem (b) time for colour to show (c) the kind of flower
9. 9.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the time we wait (b) the amount of water (c) the cling film cover (d) sun or shade
10. 10.True or false: cooking oil is not needed for the density tower. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a steel spoon (b) a ball of clay (c) a glass marble (d) an empty capped bottle
12. 12.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the honey layer (b) on top of the oil (c) under the honey (d) in the water layer
13. 13.True or false: a balloon is not needed for the density tower. (a) True (b) False
14. 14.True or false: an open sheet of paper falls slowly through the air. (a) False (b) True
15. 15.True or false: a medicine dropper works by magnetism. (a) True (b) False
16. 16.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a battery cell (c) a magnet (d) bright sunlight
17. 17.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes less far (b) it goes much farther (c) it turns into a kite (d) it flies off the string
18. 18.True or false: a stone falls fast through the air. (a) True (b) False
19. 19.True or false: a compass needle works by air pressure. (a) False (b) True
20. 20.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
21. 21.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it turns into a kite (c) it gets too heavy (d) it can pop loudly
22. 22.🥄 Does sugar stirred well dissolve faster or slower? (a) faster (b) slower
23. 23.🌈 How many colours do we name in a rainbow (VIBGYOR)?
24. 24.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a balloon (c) a drinking straw (d) vinegar
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) a battery cell
26. 26.🛟 Which of these floats on water? (a) a coin (b) a metal key (c) a pebble (d) a dry leaf
27. 27.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
28. 28.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a battery cell (b) a sheet of white paper (c) a clear glass of water (d) bright sunlight
29. 29.True or false: a dry leaf floats on water. (a) True (b) False
30. 30.True or false: a big bowl is needed for the water cycle bowl. (a) True (b) False
31. 31.⚖️ 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
32. 32.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) it changes colour (c) hot water is magnetic (d) hot water is heavy
33. 33.🔮 Predict: you add two more paper clips. How does it fall? (a) it stops in the air (b) it floats up (c) faster (d) slower
34. 34.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the drop height (b) the kind of paper (c) time to reach the floor (d) the paper clip
35. 35.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) no change at all (c) less friction (d) more friction, less far
36. 36.🔍 Which is the odd one out? (a) a sugar cube (b) a strip of cloth (c) a flower stem (d) a glass marble
37. 37.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) tiny drops of water (c) only yellow light (d) many colours mixed
38. 38.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🌊 What pushes a floating cork upward? (a) the air above (b) the cork itself (c) the tub (d) the water
40. 40.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed

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