Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 945 · 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.⚖️ 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) how big we blow it (c) the same tape (d) the same string
2. 2.True or false: a paper clip is not needed for the paper helicopter. (a) True (b) False
3. 3.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) sunlight (c) water (d) a mirror
4. 4.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it in a mirror (c) never look at the Sun (d) look at it through glass
5. 5.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) water splits the light (c) the water is coloured (d) the glass is painted
6. 6.True or false: a puddle drying up is evaporation. (a) True (b) False
7. 7.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) green (c) red (d) blue
8. 8.🛟 How should you check if the sugar has dissolved? (a) taste it (b) look for leftover grains (c) poke it with a finger (d) smell it closely
9. 9.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) food colour (d) sawdust
10. 10.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a compass needle (d) a fridge magnet
11. 11.🔍 Which is the odd one out? (a) a paper towel (b) a sugar cube (c) a rubber eraser (d) a strip of cloth
12. 12.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
13. 13.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is kept the same. (a) True (b) False
14. 14.True or false: turmeric powder is needed for the paper helicopter. (a) True (b) False
15. 15.True or false: a teaspoon is needed for the dissolving test. (a) True (b) False
16. 16.True or false: wet clothes drying is evaporation. (a) True (b) False
17. 17.🧺 Do we need yeast for the water cycle bowl? (a) needed (b) not needed
18. 18.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.🔍 Which is the odd one out? (a) a stone (b) a glass marble (c) a crumpled paper ball (d) an open sheet of paper
20. 20.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.💧 Which of these lets water climb up it? (a) a steel spoon (b) a piece of chalk (c) a piece of foil (d) a plastic ruler
23. 23.🔍 Which is the odd one out? (a) a rubber eraser (b) a steel spoon (c) a piece of foil (d) a strip of cloth
24. 24.🧺 Which of these is needed for the dissolving test? (a) a comb (b) a mirror (c) a clock or timer (d) cotton wool
25. 25.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the water turns to ice (d) the card stays on
26. 26.True or false: a suction hook works by magnetism. (a) True (b) False
27. 27.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🍯 Why does honey sink to the bottom of the glass? (a) it is the stickiest (b) it is yellow (c) it is the coldest (d) it is the densest
29. 29.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the water temperature (b) the amount of water (c) the kind of sugar (d) the amount of sugar
30. 30.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) yeast (c) sticky tape (d) a mirror
31. 31.🧺 Do we need a mirror for the density tower? (a) not needed (b) needed
32. 32.🧺 Do we need a battery cell for the float-or-sink test? (a) needed (b) not needed
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a stiff postcard (d) a sink or a bucket
34. 34.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same card (b) how full the glass is (c) the way we turn it (d) the same glass
35. 35.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a balloon (c) a battery cell (d) a sunny window
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.🛟 Does an iron nail float or sink in water? (a) floats (b) sinks
38. 38.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) a sheet of glass (b) neither of them (c) the flat sheet (d) the crumpled ball
39. 39.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) sugar (c) two clear glasses (d) honey
40. 40.🛟 Which scissors should children use to cut the paper? (a) a paper cutter (b) safety scissors (c) gardening shears (d) sharp kitchen shears

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