Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 917 · 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.🛟 How should you check if the sugar has dissolved? (a) smell it closely (b) taste it (c) poke it with a finger (d) look for leftover grains
2. 2.🥄 Which of these dissolves faster? (a) a big sugar cube (b) sugar left unstirred (c) sugar in icy water (d) sugar stirred well
3. 3.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.True or false: table salt dissolves in water. (a) False (b) True
5. 5.🧺 Do we need a mirror for the balloon rocket? (a) needed (b) not needed
6. 6.⚖️ 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 length of the stem (b) the room it stands in (c) the amount of colour (d) the amount of water
7. 7.⚖️ 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 keep it the same (b) we change it (c) we measure it
8. 8.🚀 In “push back, move forward”, which way does the rocket go? (a) goes backward (b) goes forward
9. 9.⚖️ 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 measure it (c) we keep it the same
10. 10.True or false: a tall clear glass is needed for the density tower. (a) False (b) True
11. 11.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) yeast (c) a battery cell (d) sticky tape
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a battery cell (c) a clear glass of water (d) bright sunlight
13. 13.🧺 Do we need a spoon for the density tower? (a) not needed (b) needed
14. 14.💧 Which of these is freezing? (a) wet clothes drying (b) drops under a pot lid (c) sweat drying on skin (d) water becoming ice
15. 15.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls fast (b) falls slowly
16. 16.🧺 Do we need ice cubes for the water cycle bowl? (a) needed (b) not needed
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) distance it travels (b) how big we blow it (c) the slope of the string (d) the same tape
18. 18.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) air (d) water
19. 19.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the sugar turns to salt (b) some stays undissolved (c) the water turns solid (d) all of it dissolves
20. 20.🚁 Dropped from a raised hand, does a toy parachute fall slowly or fast? (a) falls fast (b) falls slowly
21. 21.🔍 Which is the odd one out? (a) a pebble (b) cooking oil (c) a glass marble (d) a coin
22. 22.🛟 Which of these floats on water? (a) an iron nail (b) a piece of thermocol (c) a steel spoon (d) a glass marble
23. 23.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) how many drops form (b) sun or shade (c) the amount of water (d) the size of the bowl
24. 24.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) a small cup (c) turmeric powder (d) a big bowl
25. 25.🔍 Which is the odd one out? (a) a cork (b) cooking oil (c) an ice cube (d) very salty water
26. 26.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a results table (c) a tub of water (d) a balloon
28. 28.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: how many drops form is what we measure. (a) True (b) False
29. 29.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) little air left inside (d) the card gets wet
30. 30.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the glass is painted (c) water splits the light (d) the paper makes colours
31. 31.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a medicine dropper (b) a suction hook (c) a fridge magnet (d) a drinking straw
33. 33.🧺 Which of these is not needed for the density tower? (a) turmeric powder (b) a tall clear glass (c) honey (d) cooking oil
34. 34.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of pouring”? (a) we measure it (b) we keep it the same (c) we change it
35. 35.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
36. 36.🔍 Which is the odd one out? (a) a plastic ruler (b) a piece of chalk (c) a glass marble (d) a piece of foil
37. 37.True or false: a big bowl is not needed for the water cycle bowl. (a) True (b) False
38. 38.🧺 Do we need turmeric powder for the water cycle bowl? (a) not needed (b) needed
39. 39.🧊 Why does an ice cube float on water? (a) ice is very cold (b) ice is less dense (c) water is sticky (d) ice is magnetic
40. 40.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is what we measure. (a) True (b) False

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