Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 18 · 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 is less dense than water? (a) a glass marble (b) honey (c) very salty water (d) a cork
2. 2.🧺 Do we need cooking oil for the density tower? (a) not needed (b) needed
3. 3.🧺 Which of these is not needed for the balloon rocket? (a) two chairs (b) a drinking straw (c) a battery cell (d) sticky tape
4. 4.🔮 Predict: you blow the balloon up only a little. What happens? (a) it turns into a kite (b) it flies off the string (c) it goes much farther (d) it goes less far
5. 5.🚁 Which of these falls slowly through the air? (a) a stone (b) a feather (c) a coin (d) a glass marble
6. 6.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) a balloon (d) bright sunlight
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is kept the same. (a) False (b) True
8. 8.🧺 Do we need a magnet for the density tower? (a) not needed (b) needed
9. 9.🧺 Do we need yeast for the density tower? (a) not needed (b) needed
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.True or false: a sunny window is not needed for the water rainbow. (a) False (b) True
12. 12.True or false: sugar stirred well dissolves slower. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) a sugar cube (b) a plastic ruler (c) a paper towel (d) a cotton thread
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) brightness of rainbow (b) the amount of water (c) the same white paper (d) the same window
15. 15.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the order of the layers (b) the same three liquids (c) how much of each liquid (d) the order of pouring
16. 16.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a battery cell (b) a pencil (c) a paper clip (d) safety scissors
17. 17.🔍 Which is the odd one out? (a) an open sheet of paper (b) a crumpled paper ball (c) a glass marble (d) a stone
18. 18.🧺 Do we need two clear glasses for the dissolving test? (a) not needed (b) needed
19. 19.🧺 Which of these is needed for the paper helicopter? (a) yeast (b) a strip of paper (c) a magnet (d) a balloon
20. 20.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) a battery cell (c) bright sunlight (d) a magnet
21. 21.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it dissolves (b) it turns to stone (c) it sinks faster (d) it can float
22. 22.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
23. 23.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of pouring (b) the same glass (c) the order of the layers (d) how much of each liquid
24. 24.🧺 Which of these is not needed for the balloon rocket? (a) a balloon (b) turmeric powder (c) a drinking straw (d) sticky tape
25. 25.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.🔍 Which is the odd one out? (a) a feather (b) an ice cube (c) a metal key (d) a cork
27. 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is what we measure. (a) True (b) False
28. 28.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the kind of paper (b) time to reach the floor (c) the length of the blades (d) the paper clip
29. 29.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) the same (b) slower (c) not at all (d) faster
30. 30.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
31. 31.True or false: a battery cell is needed for the balloon rocket. (a) False (b) True
32. 32.⚖️ 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 white paper (b) the same window (c) the amount of water (d) the same glass
33. 33.True or false: yeast is not needed for the water rainbow. (a) False (b) True
34. 34.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a magnet (c) a mirror (d) a sunny window
35. 35.🥚 A fresh egg sinks in plain water. What makes it float? (a) lots of salt stirred in (b) a little shaking (c) more plain water (d) a few ice cubes
36. 36.🧺 Do we need yeast for the float-or-sink test? (a) needed (b) not needed
37. 37.🎈 Why does the balloon rocket move along the string? (a) the string pulls it (b) escaping air pushes it (c) the straw is heavy (d) a magnet pulls it
38. 38.True or false: a magnet is not needed for the dissolving test. (a) False (b) True
39. 39.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) colour climbs up it (c) nothing ever happens (d) it sinks at once
40. 40.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) time to reach the floor (b) the drop height (c) the kind of paper (d) the length of the blades

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids