Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 428 · 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 not needed for the balloon rocket? (a) sticky tape (b) two chairs (c) yeast (d) a drinking straw
2. 2.True or false: a pebble floats on water. (a) True (b) False
3. 3.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🧺 Which of these is needed for the balloon rocket? (a) a drinking straw (b) turmeric powder (c) a battery cell (d) vinegar
5. 5.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
6. 6.🚀 In “push back, move forward”, which way does the balloon go? (a) goes backward (b) goes forward
7. 7.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) yeast (b) honey (c) a tall clear glass (d) a spoon
8. 8.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.True or false: a feather sinks in water. (a) False (b) True
10. 10.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🍯 Which of these is less dense than water? (a) air (b) a coin (c) very salty water (d) honey
12. 12.True or false: an iron nail sinks in water. (a) True (b) False
13. 13.💧 Which change is this: butter going runny? (a) freezing (b) melting (c) evaporation (d) condensation
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the amount of colour (b) time for colour to show (c) the amount of water (d) the kind of flower
15. 15.True or false: a steel spoon sinks in water. (a) False (b) True
16. 16.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) stare at the Sun (d) never look at the Sun
17. 17.🔮 Predict: the string slopes uphill. What happens? (a) it speeds up (b) it travels farther (c) it goes backward first (d) it travels less far
18. 18.True or false: a ping-pong ball floats on water. (a) True (b) False
19. 19.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) a shadow of ice (c) a small rainbow (d) snow falling
20. 20.🧺 Which of these is not needed for the density tower? (a) water with food colour (b) a tall clear glass (c) a battery cell (d) a spoon
21. 21.True or false: very salty water is less dense than water. (a) False (b) True
22. 22.True or false: a balloon is not needed for the density tower. (a) False (b) True
23. 23.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) the person dropping (c) time to reach the floor
24. 24.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the kind of flower (b) the length of the stem (c) the amount of water (d) the amount of colour
25. 25.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is what we measure. (a) True (b) False
26. 26.🛟 Does a cork float or sink in water? (a) sinks (b) floats
27. 27.🔍 Which is the odd one out? (a) a suction hook (b) a compass needle (c) a magnetic chess set (d) a fridge magnet
28. 28.🔍 Which is the odd one out? (a) a pebble (b) honey (c) an ice cube (d) a glass marble
29. 29.True or false: a magnet is not needed for the paper helicopter. (a) True (b) False
30. 30.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they turn to ice (b) faster (c) slower (d) they never dry
31. 31.🛟 Which scissors should children use to cut the paper? (a) safety scissors (b) a paper cutter (c) gardening shears (d) sharp kitchen shears
32. 32.💧 Which of these does not let water climb? (a) a piece of chalk (b) a steel spoon (c) a cotton thread (d) a paper towel
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) yeast (c) a clear glass of water (d) a sheet of white paper
34. 34.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) cotton wool (c) two clear glasses (d) warm water
35. 35.True or false: a magnet is needed for the float-or-sink test. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) a crumpled paper ball (b) an open sheet of paper (c) a glass marble (d) a coin
37. 37.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) yeast (c) a sunny window (d) a clear glass of water
38. 38.True or false: sugar stirred well dissolves slower. (a) True (b) False
39. 39.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed

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