Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 679 · 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.🥄 Which of these dissolves in water? (a) baking soda (b) chalk powder (c) small pebbles (d) sand
2. 2.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) a clock or timer (c) a mirror (d) a teaspoon
3. 3.True or false: a balloon is needed for the coloured flower experiment. (a) True (b) False
4. 4.📘 What do we call light bending as it passes from air into water? (a) reflection (b) evaporation (c) magnetism (d) refraction
5. 5.🥄 Does sugar stirred well dissolve faster or slower? (a) slower (b) faster
6. 6.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) forward (b) it stays still (c) straight down (d) backward
7. 7.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is what we measure. (a) True (b) False
8. 8.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
9. 9.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) throw the glass (c) do not lick the spoon (d) taste each layer
10. 10.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) a balloon (c) a ruler (d) a paper clip
11. 11.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
12. 12.🧺 Do we need honey for the density tower? (a) not needed (b) needed
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.True or false: a mirror is needed for the water rainbow. (a) False (b) True
15. 15.🧺 Which of these is needed for the water cycle bowl? (a) a balloon (b) a mirror (c) cling film (d) a battery cell
16. 16.⚖️ 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 same glass”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🧺 Which of these is not needed for the water cycle bowl? (a) ice cubes (b) a big bowl (c) a small cup (d) yeast
18. 18.🍯 Is very salty water denser or less dense than water? (a) less dense than water (b) denser than water
19. 19.🎈 What is the job of the straw on the string? (a) it makes it heavier (b) it holds water (c) it blows air in (d) it guides the balloon
20. 20.🧺 Do we need yeast for the balloon rocket? (a) needed (b) not needed
21. 21.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the same glass (c) the amount of water
22. 22.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they turn to ice (b) they never dry (c) slower (d) faster
23. 23.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a magnet (d) a towel
24. 24.True or false: turmeric powder is needed for the density tower. (a) False (b) True
25. 25.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) little air left inside (d) the card gets wet
26. 26.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the stirring (c) the water temperature
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a magnet (c) a stiff postcard (d) a towel
29. 29.💧 Which change is this: dew on morning grass? (a) condensation (b) freezing (c) evaporation (d) melting
30. 30.🧺 Do we need yeast for the density tower? (a) not needed (b) needed
31. 31.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a drinking straw (c) vinegar (d) two chairs
32. 32.🚁 Dropped from a raised hand, does a feather fall slowly or fast? (a) falls fast (b) falls slowly
33. 33.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) no change at all (c) more friction, less far (d) it goes faster
35. 35.🚁 Which of these falls fast through the air? (a) a paper helicopter (b) a fluff of cotton (c) a stone (d) a toy parachute
36. 36.📘 What pulls the paper helicopter down to the floor? (a) air pressure (b) the wind (c) magnetism (d) gravity
37. 37.📘 Air presses on everything around us. What is this push called? (a) friction (b) sunlight (c) air pressure (d) magnetism
38. 38.⚖️ 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 the layers”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🔍 Which is the odd one out? (a) a stone (b) a feather (c) a paper helicopter (d) a fluff of cotton
40. 40.⚖️ 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 keep it the same (b) we change it (c) we measure it

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