Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 210 · 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 the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is the one thing we change. (a) False (b) True
2. 2.True or false: wet hair drying is freezing. (a) True (b) False
3. 3.🧺 Which of these is not needed for the paper helicopter? (a) a paper clip (b) a pencil (c) a balloon (d) a strip of paper
4. 4.🌈 In VIBGYOR, what number colour is violet?
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a glass of water (c) a towel (d) a stiff postcard
6. 6.🧺 Which of these is needed for the float-or-sink test? (a) a results table (b) a mirror (c) turmeric powder (d) a balloon
7. 7.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
8. 8.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
10. 10.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) whether the card stays (b) the way we turn it (c) how full the glass is (d) the same glass
11. 11.⚖️ 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 measure it (b) we change it (c) we keep it the same
12. 12.True or false: a coin is less dense than water. (a) False (b) True
13. 13.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
14. 14.🧺 Do we need a balloon for the float-or-sink test? (a) needed (b) not needed
15. 15.🛟 What should you do with popped balloon pieces? (a) throw them away safely (b) give them to a baby (c) chew them (d) keep them in your mouth
16. 16.🛟 How should you check if the sugar has dissolved? (a) smell it closely (b) look for leftover grains (c) poke it with a finger (d) taste it
17. 17.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it spread in the water (b) it became air (c) it sank as sand (d) it vanished for ever
18. 18.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) leave water on the floor (c) wipe up spills at once (d) run around the tub
19. 19.🔍 How can you get the salt back from salty water? (a) keep it in a fridge (b) stir it more (c) add more water (d) let the water evaporate
20. 20.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
21. 21.📘 What is water vapour? (a) salty water (b) water as a gas (c) a kind of smoke (d) tiny ice cubes
22. 22.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
23. 23.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is kept the same. (a) True (b) False
24. 24.🛟 Which of these floats on water? (a) an ice-cream stick (b) a glass marble (c) a pebble (d) a metal key
25. 25.🧺 Do we need a magnet for the dissolving test? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) water (c) a small cup (d) yeast
27. 27.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) sugar in icy water (c) sugar in warm water (d) a big sugar cube
28. 28.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.🛟 Which of these floats on water? (a) a steel spoon (b) an iron nail (c) a pebble (d) a piece of thermocol
30. 30.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it does not fall (c) it spins the other way (d) it turns blue
31. 31.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) yeast (c) turmeric powder (d) a clear glass of water
32. 32.True or false: a glass of water is not needed for the coloured flower experiment. (a) False (b) True
33. 33.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) vinegar (b) a balloon (c) a long string (d) sticky tape
34. 34.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water can scald (c) hot water is heavy (d) hot water is magnetic
35. 35.True or false: a long string is not needed for the balloon rocket. (a) True (b) False
36. 36.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) False (b) True
37. 37.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
38. 38.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
39. 39.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is what we measure. (a) False (b) True
40. 40.🎈 Why does the balloon rocket move along the string? (a) a magnet pulls it (b) the straw is heavy (c) the string pulls it (d) escaping air pushes it

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