Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 10 · 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.💧 In the covered bowl, where does the water vapour come from? (a) the cling film (b) the bowl itself (c) water warmed by the Sun (d) the air outside
2. 2.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls slowly (b) falls fast
3. 3.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it sinks faster (c) it can float (d) it dissolves
4. 4.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the tub of water (b) whether it floats (c) the kind of clay (d) the shape of the clay
5. 5.🔍 Which is the odd one out? (a) a misty bathroom mirror (b) drops under a pot lid (c) dew on morning grass (d) wet clothes drying
6. 6.True or false: cling film is not needed for the water cycle bowl. (a) False (b) True
7. 7.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is kept the same. (a) True (b) False
8. 8.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) some stays undissolved (c) the sugar turns to salt (d) the water turns solid
9. 9.⚖️ 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 change it (b) we measure it (c) we keep it the same
10. 10.🧺 Do we need ice cubes for the water cycle bowl? (a) needed (b) not needed
11. 11.🧺 Do we need a spoon for the density tower? (a) not needed (b) needed
12. 12.🔮 A big log and a small pebble go into a pond. Which one floats? (a) both of them (b) neither of them (c) the big log (d) the small pebble
13. 13.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
14. 14.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) slower (b) faster (c) they turn to ice (d) they never dry
15. 15.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) distance it travels (c) how big we blow it (d) the slope of the string
16. 16.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) a battery cell (c) yeast (d) turmeric powder
17. 17.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of pouring”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.🛟 Does a feather float or sink in water? (a) sinks (b) floats
19. 19.🛟 What should you do after handling food colour? (a) wipe them on walls (b) wash your hands (c) rub your eyes (d) lick your fingers
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is what we measure. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) honey (b) a coin (c) very salty water (d) a ping-pong ball
22. 22.⚖️ 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) True (b) False
23. 23.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) a battery cell (c) a magnet (d) a balloon
24. 24.True or false: a battery cell is needed for the float-or-sink test. (a) False (b) True
25. 25.🚁 Which of these falls fast through the air? (a) a fluff of cotton (b) a stone (c) a paper helicopter (d) an open sheet of paper
26. 26.🔍 Which is the odd one out? (a) an ice cube (b) an ice-cream stick (c) a cork (d) a pebble
27. 27.🧺 Do we need two clear glasses for the dissolving test? (a) not needed (b) needed
28. 28.⚖️ 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) False (b) True
29. 29.🔍 Which is the odd one out? (a) an open sheet of paper (b) a crumpled paper ball (c) a paper helicopter (d) a fluff of cotton
30. 30.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) how many drops form (b) sun or shade (c) the time we wait
31. 31.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) slower (b) faster (c) the same (d) not at all
32. 32.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sheet of white paper (c) a mirror (d) a clear glass of water
33. 33.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) a sunny window (c) a clear glass of water (d) bright sunlight
34. 34.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) honey (c) a battery cell (d) cooking oil
35. 35.True or false: sand dissolves in water. (a) False (b) True
36. 36.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is kept the same. (a) True (b) False
37. 37.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) a magnet (c) cold water (d) two clear glasses
38. 38.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to splash everyone (c) to keep children safe (d) to hide the corks
39. 39.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is kept the same. (a) False (b) True
40. 40.🍯 Which of these is denser than water? (a) a cork (b) a pebble (c) air (d) a ping-pong ball

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