Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 358 · 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.🛟 Does a dry leaf float or sink in water? (a) sinks (b) floats
2. 2.True or false: a battery cell is needed for the paper helicopter. (a) False (b) True
3. 3.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) wipe up spills at once (c) leave water on the floor (d) run around the tub
4. 4.True or false: an ice-cream stick sinks in water. (a) True (b) False
5. 5.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a drinking straw (d) a magnetic chess set
6. 6.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) in the oil layer (c) in the water layer (d) at the very bottom
7. 7.🌼 How does coloured water reach the petals? (a) it rains on them (b) through tiny stem tubes (c) through the air (d) it is sprayed on
8. 8.True or false: the rocket goes backward. (a) False (b) True
9. 9.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
10. 10.True or false: the swimmer goes forward. (a) True (b) False
11. 11.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the amount of water (b) the water temperature (c) time to dissolve
12. 12.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
13. 13.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes backward (b) goes forward
14. 14.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a battery cell (c) bright sunlight (d) a sunny window
15. 15.🍯 Is a cork denser or less dense than water? (a) denser than water (b) less dense than water
16. 16.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) False (b) True
17. 17.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🥄 Which of these dissolves slower? (a) sugar in warm water (b) powdered sugar (c) sugar stirred well (d) sugar left unstirred
19. 19.🎈 When does the balloon rocket stop? (a) when the air runs out (b) it never stops (c) when it turns blue (d) when it gets cold
20. 20.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) on top of the oil (c) under the honey (d) in the honey layer
21. 21.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.True or false: a tub of water is not needed for the float-or-sink test. (a) False (b) True
23. 23.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a magnet (c) a clear glass of water (d) a sunny window
24. 24.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls fast (b) falls slowly
25. 25.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
26. 26.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
27. 27.🔍 Which is the odd one out? (a) an empty capped bottle (b) a dry leaf (c) a pebble (d) an ice cube
28. 28.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we keep it the same (b) we measure it (c) we change it
29. 29.🔍 Which is the odd one out? (a) a strip of cloth (b) a flower stem (c) a sugar cube (d) a rubber eraser
30. 30.💧 Which of these is condensation? (a) butter going runny (b) wet hair drying (c) dew on morning grass (d) sweat drying on skin
31. 31.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the order of pouring (b) the same glass (c) the same three liquids (d) how much of each liquid
33. 33.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) cotton wool (c) warm water (d) two clear glasses
34. 34.🎈 Why does the balloon rocket move along the string? (a) the string pulls it (b) a magnet pulls it (c) the straw is heavy (d) escaping air pushes it
35. 35.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) turmeric powder (c) a few hours of waiting (d) a white flower
37. 37.True or false: a cork is less dense than water. (a) False (b) True
38. 38.🧺 Which of these is needed for the water cycle bowl? (a) a magnet (b) a balloon (c) a battery cell (d) cling film
39. 39.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to cool the glass (d) to catch any spills
40. 40.True or false: sweat drying on skin is evaporation. (a) True (b) False

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