Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 392 · 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 can you get the salt back from salty water? (a) add more water (b) stir it more (c) let the water evaporate (d) keep it in a fridge
2. 2.🔍 Which is the odd one out? (a) a steel spoon (b) an open sheet of paper (c) a crumpled paper ball (d) a coin
3. 3.True or false: chalk powder dissolves in water. (a) False (b) True
4. 4.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
5. 5.🧺 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 sunny window (d) a balloon
6. 6.🍯 Is a pebble denser or less dense than water? (a) denser than water (b) less dense than water
7. 7.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) a magnet (d) the cold water
8. 8.True or false: yeast is needed for the water cycle bowl. (a) True (b) False
9. 9.⚖️ 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 the layers (b) the order of pouring (c) the same glass (d) the same three liquids
10. 10.True or false: a mirror is needed for the water cycle bowl. (a) True (b) False
11. 11.True or false: vinegar is needed for the balloon rocket. (a) True (b) False
12. 12.🎈 Why does the balloon rocket move along the string? (a) the straw is heavy (b) the string pulls it (c) a magnet pulls it (d) escaping air pushes it
13. 13.🛟 Does a ping-pong ball float or sink in water? (a) sinks (b) floats
14. 14.⚖️ 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 amount of water (c) the amount of colour (d) the room it stands in
15. 15.🍯 Is a cork denser or less dense than water? (a) less dense than water (b) denser than water
16. 16.🧺 Do we need vinegar for the balloon rocket? (a) not needed (b) needed
17. 17.⚖️ 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 keep it the same (b) we measure it (c) we change it
18. 18.🥚 A fresh egg sinks in plain water. What makes it float? (a) more plain water (b) a little shaking (c) lots of salt stirred in (d) a few ice cubes
19. 19.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the drop height (b) the length of the blades (c) the person dropping (d) time to reach the floor
20. 20.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) vinegar (b) a drinking straw (c) sticky tape (d) a balloon
21. 21.🛟 What should you do with popped balloon pieces? (a) give them to a baby (b) throw them away safely (c) chew them (d) keep them in your mouth
22. 22.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
23. 23.True or false: yeast is not needed for the water cycle bowl. (a) False (b) True
24. 24.True or false: sunlight is needed for the water cycle bowl. (a) True (b) False
25. 25.True or false: a mirror is not needed for the density tower. (a) False (b) True
26. 26.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to salt (b) it turns to drops (c) it disappears (d) it turns to smoke
27. 27.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a white flower (c) a balloon (d) a glass of water
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) how full the glass is (b) the same card (c) whether the card stays
29. 29.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) capillary action (c) melting (d) magnetism
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is kept the same. (a) False (b) True
31. 31.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is what we measure. (a) False (b) True
32. 32.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) food colour (c) yeast (d) a balloon
33. 33.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🧺 Which of these is needed for the density tower? (a) a battery cell (b) a mirror (c) a spoon (d) a balloon
35. 35.🧺 Do we need small test objects for the float-or-sink test? (a) needed (b) not needed
36. 36.True or false: a piece of foil lets water climb up it. (a) False (b) True
37. 37.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) sand (d) smoke
38. 38.True or false: baking soda does not dissolve in water. (a) False (b) True
39. 39.🧺 Do we need honey for the density tower? (a) not needed (b) needed
40. 40.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed

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