Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 983 · 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 freezing? (a) water becoming ice (b) a misty bathroom mirror (c) ice becoming water (d) drops on a cold glass
2. 2.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) violet (c) orange (d) red
3. 3.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same straw (b) the slope of the string (c) how big we blow it (d) distance it travels
4. 4.⚖️ 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
5. 5.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a sundial (b) a balloon rocket (c) a fridge magnet (d) a mirror
6. 6.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it turns blue (c) it does not fall (d) it spins the other way
7. 7.🔍 Which is the odd one out? (a) a sugar cube (b) a glass marble (c) a plastic ruler (d) a piece of foil
8. 8.🔍 Which is the odd one out? (a) cooking oil (b) a pebble (c) a coin (d) honey
9. 9.🔍 Which is the odd one out? (a) honey (b) a cork (c) a ping-pong ball (d) cooking oil
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the room it stands in is the one thing we change. (a) False (b) True
11. 11.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a battery cell (c) small test objects (d) a tub of water
12. 12.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a mirror (c) a sunny window (d) a clear glass of water
13. 13.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sheet of white paper (c) a balloon (d) a sunny window
14. 14.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
15. 15.💧 Which change is this: snow turning to water? (a) freezing (b) condensation (c) melting (d) evaporation
16. 16.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is the one thing we change. (a) False (b) True
18. 18.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) a sheet of glass (b) the flat sheet (c) the crumpled ball (d) neither of them
19. 19.True or false: an ice cube is less dense than water. (a) False (b) True
20. 20.🔍 Sand is stirred into water. What do you see after a while? (a) it settles at the bottom (b) it floats up (c) it turns blue (d) it dissolves
21. 21.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
22. 22.⚖️ 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) the size of the bowl (b) sun or shade (c) how many drops form
23. 23.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) True (b) False
24. 24.💧 Which of these is evaporation? (a) ice becoming water (b) dew on morning grass (c) a misty bathroom mirror (d) wet hair drying
25. 25.🧺 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 sunny window (d) turmeric powder
26. 26.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is the one thing we change. (a) False (b) True
27. 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is kept the same. (a) False (b) True
28. 28.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to win a prize (d) to keep children safe
29. 29.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.🧺 Which of these is needed for the float-or-sink test? (a) a towel for spills (b) yeast (c) turmeric powder (d) a balloon
31. 31.True or false: a magnetic chess set works by air pressure. (a) True (b) False
32. 32.True or false: a sunny window is not needed for the water rainbow. (a) False (b) True
33. 33.True or false: a bicycle pump works by air pressure. (a) False (b) True
34. 34.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) it turns to ice (c) some water evaporates (d) the water increases
35. 35.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) the tub of water (c) whether it floats
36. 36.🔮 A big log and a small pebble go into a pond. Which one floats? (a) neither of them (b) both of them (c) the big log (d) the small pebble
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.True or false: a glass marble is less dense than water. (a) True (b) False
39. 39.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) leave water on the floor (c) wipe up spills at once (d) play near a deep pond
40. 40.True or false: warm water is not needed for the dissolving test. (a) True (b) False

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