Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 252 · 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.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) turmeric powder (c) a drinking straw (d) sticky tape
2. 2.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
3. 3.True or false: a spoon is needed for the density tower. (a) True (b) False
4. 4.🛟 Which of these floats on water? (a) a steel spoon (b) an iron nail (c) a metal key (d) an ice cube
5. 5.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the stem turns to ice (c) the flower floats away (d) the petals turn bluish
6. 6.🍯 Which of these is less dense than water? (a) a glass marble (b) a coin (c) a pebble (d) a cork
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a mirror (d) a balloon
8. 8.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) faster (c) it stops in the air (d) it floats up
9. 9.🔮 Predict: you fold the two blades the other way. What changes? (a) it turns blue (b) it spins the other way (c) it does not fall (d) it falls upward
10. 10.🛟 Which of these sinks in water? (a) a metal key (b) an ice cube (c) a feather (d) an empty capped bottle
11. 11.True or false: sawdust dissolves in water. (a) False (b) True
12. 12.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we keep it the same (b) we change it (c) we measure it
13. 13.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) a magnet (c) a drinking straw (d) two chairs
14. 14.True or false: sugar left unstirred dissolves slower. (a) True (b) False
15. 15.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) it stays still (b) forward (c) backward (d) straight down
16. 16.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a mirror (c) a magnet (d) a clear glass of water
17. 17.🧺 Do we need a mirror for the float-or-sink test? (a) needed (b) not needed
18. 18.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of pouring (b) the order of the layers (c) the same glass (d) how much of each liquid
19. 19.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
20. 20.True or false: a drinking straw is not needed for the balloon rocket. (a) True (b) False
21. 21.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a roof edge (c) a wobbly chair (d) a high window ledge
23. 23.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) it turns to salt (c) some water evaporates (d) the water increases
24. 24.True or false: two clear glasses is needed for the dissolving test. (a) False (b) True
25. 25.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it dissolves (c) it sinks faster (d) it can float
26. 26.🚀 Which of these goes forward? (a) water from the oars (b) water a swimmer pushes (c) air from the balloon (d) the balloon
27. 27.True or false: a piece of foil lets water climb up it. (a) False (b) True
28. 28.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the paper clip (b) the kind of paper (c) time to reach the floor (d) the person dropping
29. 29.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) melting (c) magnetism (d) capillary action
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) turmeric powder (c) a sheet of white paper (d) bright sunlight
31. 31.True or false: a battery cell is needed for the coloured flower experiment. (a) False (b) True
32. 32.🔍 You drop a coin into a tub of water. What do you see? (a) it bounces up (b) it floats (c) it sinks (d) it dissolves
33. 33.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the water turns red (b) the bowl freezes (c) more drops form (d) fewer drops form
34. 34.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the person dropping (b) the length of the blades (c) time to reach the floor
35. 35.🔍 Which is the odd one out? (a) a piece of foil (b) a rubber eraser (c) a steel spoon (d) a sugar cube
36. 36.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
37. 37.🔍 Which is the odd one out? (a) a rubber eraser (b) a paper towel (c) a piece of foil (d) a steel spoon
38. 38.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) clouds (d) magnets
39. 39.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) yeast (c) a results table (d) small test objects
40. 40.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed

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