Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 872 · 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 magnetic chess set (b) a bicycle pump (c) a fridge magnet (d) a magnetic pin holder
2. 2.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it fall slower (b) to make it magnetic (c) to weigh down the bottom (d) to stop the spinning
3. 3.True or false: drops under a pot lid is condensation. (a) False (b) True
4. 4.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) it floats up (c) it stops in the air (d) faster
5. 5.True or false: a small cup is needed for the water cycle bowl. (a) False (b) True
6. 6.🥄 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the glass breaks (d) the water turns to ice
8. 8.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the length of the blades (b) time to reach the floor (c) the drop height (d) the paper clip
9. 9.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) air inside pushes back (d) water is hiding there
10. 10.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is kept the same. (a) False (b) True
11. 11.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
12. 12.🥄 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a magnet (c) bright sunlight (d) a battery cell
14. 14.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) sugar in icy water (c) a big sugar cube (d) sugar stirred well
15. 15.🧺 Do we need a results table for the float-or-sink test? (a) not needed (b) needed
16. 16.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
17. 17.🌈 How many colours do we name in a rainbow (VIBGYOR)?
18. 18.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is kept the same. (a) False (b) True
19. 19.🧺 Which of these is needed for the paper helicopter? (a) yeast (b) a mirror (c) safety scissors (d) turmeric powder
20. 20.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we keep it the same (b) we change it (c) we measure it
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is the one thing we change. (a) True (b) False
23. 23.🧺 Do we need a comb for the dissolving test? (a) not needed (b) needed
24. 24.True or false: a ping-pong ball floats on water. (a) True (b) False
25. 25.🧺 Which of these is not needed for the dissolving test? (a) a teaspoon (b) two clear glasses (c) a magnet (d) warm water
26. 26.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the size of the bowl (b) the amount of water (c) sun or shade (d) the time we wait
27. 27.🚁 Dropped from a raised hand, does a crumpled paper ball fall slowly or fast? (a) falls fast (b) falls slowly
28. 28.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) the tub of water (c) whether it floats
30. 30.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they fall off at once (c) they all turn green (d) they turn two colours
31. 31.🥄 Does a big sugar cube dissolve faster or slower? (a) faster (b) slower
32. 32.🧺 Which of these is not needed for the paper helicopter? (a) a magnet (b) a pencil (c) a ruler (d) safety scissors
33. 33.True or false: warm water is needed for the dissolving test. (a) True (b) False
34. 34.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
35. 35.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is the one thing we change. (a) False (b) True
36. 36.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of sugar (b) time to dissolve (c) the stirring (d) the water temperature
37. 37.🧊 Why does an ice cube float on water? (a) ice is very cold (b) ice is magnetic (c) water is sticky (d) ice is less dense
38. 38.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a sheet of white paper (d) a battery cell
39. 39.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a tall clear glass (c) a balloon (d) cooking oil
40. 40.True or false: a clear glass of water is needed for the water rainbow. (a) False (b) True

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