Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 866 · 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 is the odd one out? (a) a suction hook (b) a compass needle (c) a bicycle pump (d) a drinking straw
2. 2.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
3. 3.🧺 Which of these is not needed for the paper helicopter? (a) a strip of paper (b) a ruler (c) safety scissors (d) a battery cell
4. 4.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) run around the tub (c) leave water on the floor (d) wipe up spills at once
5. 5.🔍 Which is the odd one out? (a) a cotton thread (b) a sugar cube (c) a paper towel (d) a rubber eraser
6. 6.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) do not lick the spoon (c) throw the glass (d) pour it on the floor
7. 7.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) turmeric powder (c) a magnet (d) a balloon
8. 8.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a clear glass of water (d) a battery cell
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same white paper (b) the amount of water (c) brightness of rainbow (d) the time of day
11. 11.🌊 What pushes a floating cork upward? (a) the water (b) the cork itself (c) the air above (d) the tub
12. 12.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
13. 13.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it in a mirror (c) look at it through glass (d) stare at the Sun
14. 14.True or false: a strip of cloth lets water climb up it. (a) False (b) True
15. 15.🌈 In VIBGYOR, what number colour is indigo?
16. 16.⚖️ 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) the way we turn it (b) how full the glass is (c) whether the card stays (d) the same card
17. 17.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the same glass (b) brightness of rainbow (c) the amount of water (d) the time of day
18. 18.🧺 Which of these is not needed for the coloured flower experiment? (a) yeast (b) food colour (c) a white flower (d) a few hours of waiting
19. 19.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a balloon (d) a sunny window
20. 20.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) yeast (d) bright sunlight
21. 21.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) True (b) False
22. 22.True or false: yeast is not needed for the density tower. (a) False (b) True
23. 23.True or false: a paper towel lets water climb up it. (a) False (b) True
24. 24.True or false: wet hair drying is condensation. (a) True (b) False
25. 25.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the water temperature (b) time to dissolve (c) the kind of sugar
26. 26.⚖️ 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) time for colour to show (b) the length of the stem (c) the amount of colour (d) the kind of flower
27. 27.True or false: yeast is not needed for the paper helicopter. (a) False (b) True
28. 28.🛟 Which of these floats on water? (a) a ball of clay (b) a feather (c) a pebble (d) a metal key
29. 29.🚁 Which of these falls slowly through the air? (a) a fluff of cotton (b) a steel spoon (c) a coin (d) a crumpled paper ball
30. 30.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a suction hook (c) a compass needle (d) a magnetic chess set
31. 31.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) a pencil (c) yeast (d) a paper clip
32. 32.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) water with food colour (c) a balloon (d) a spoon
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a towel (c) a stiff postcard (d) a glass of water
34. 34.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a pet (c) a grown-up (d) a toddler
35. 35.⚖️ 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) the cling film cover (b) the amount of water (c) the time we wait (d) how many drops form
36. 36.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
37. 37.🧺 Which of these is not needed for the density tower? (a) a battery cell (b) honey (c) a spoon (d) a tall clear glass
38. 38.🧺 Which of these is needed for the dissolving test? (a) a balloon (b) honey (c) sugar (d) a mirror
39. 39.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
40. 40.🚀 In “push back, move forward”, which way does gas from the rocket go? (a) goes backward (b) goes forward

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