Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 289 · 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.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) it turns brighter (d) the rainbow fades
2. 2.🔍 Which is the odd one out? (a) ice becoming water (b) snow turning to water (c) drops under a pot lid (d) butter going runny
3. 3.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) more drops form (b) the water turns red (c) fewer drops form (d) the bowl freezes
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.🛟 What should you do with wet floors after the experiment? (a) pour more water (b) leave them wet (c) wipe them dry (d) slide on them
6. 6.🎈 What is the job of the straw on the string? (a) it makes it heavier (b) it blows air in (c) it guides the balloon (d) it holds water
7. 7.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) sugar (d) sawdust
8. 8.🍯 Why does honey sink to the bottom of the glass? (a) it is yellow (b) it is the densest (c) it is the coldest (d) it is the stickiest
9. 9.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
10. 10.🛟 Does a coin float or sink in water? (a) floats (b) sinks
11. 11.⚖️ 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 length of the stem (d) the amount of water
12. 12.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a towel (c) a magnet (d) a balloon
14. 14.True or false: sand does not dissolve in water. (a) True (b) False
15. 15.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we keep it the same (b) we change it (c) we measure it
16. 16.💧 Which of these is melting? (a) making ice lollies (b) wet hair drying (c) sweat drying on skin (d) butter going runny
17. 17.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they turn to ice (b) faster (c) they never dry (d) slower
18. 18.🧺 Do we need sticky tape for the balloon rocket? (a) not needed (b) needed
19. 19.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.True or false: cooking oil is not needed for the density tower. (a) False (b) True
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) False (b) True
23. 23.True or false: a rubber eraser lets water climb up it. (a) False (b) True
24. 24.🧺 Which of these is not needed for the density tower? (a) cooking oil (b) a tall clear glass (c) honey (d) yeast
25. 25.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
26. 26.🧺 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
27. 27.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the paper clip (b) the length of the blades (c) time to reach the floor
28. 28.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🧺 Which of these is needed for the balloon rocket? (a) vinegar (b) a magnet (c) yeast (d) a balloon
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) False (b) True
31. 31.⚖️ 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 change it (b) we keep it the same (c) we measure it
32. 32.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) whether it floats (b) the kind of clay (c) the amount of clay (d) the shape of the clay
33. 33.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a sundial (b) a mirror (c) a balloon rocket (d) a fridge magnet
34. 34.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) prisms (c) balloons (d) clouds
35. 35.🍯 Which of these is less dense than water? (a) honey (b) a pebble (c) a glass marble (d) air
36. 36.🔍 Which is the odd one out? (a) an ice-cream stick (b) a ping-pong ball (c) a coin (d) a cork
37. 37.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) a results table (d) a magnet
38. 38.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
39. 39.True or false: turmeric powder is not needed for the balloon rocket. (a) False (b) True
40. 40.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a few hours of waiting (c) food colour (d) a balloon

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