Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 81 · 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 not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) yeast
2. 2.🧺 Do we need a battery cell for the paper helicopter? (a) not needed (b) needed
3. 3.🛟 Which of these sinks in water? (a) a ping-pong ball (b) a dry leaf (c) a steel spoon (d) an empty capped bottle
4. 4.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) a balloon (c) sticky tape (d) yeast
5. 5.🔍 Which layer is on top in the honey-water-oil tower? (a) honey (b) the spoon (c) coloured water (d) cooking oil
6. 6.🔍 How can you get the salt back from salty water? (a) stir it more (b) add more water (c) let the water evaporate (d) keep it in a fridge
7. 7.🥄 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it spins the other way (c) it turns blue (d) it does not fall
10. 10.True or false: a balloon is not needed for the water rainbow. (a) True (b) False
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) the same glass (c) brightness of rainbow
12. 12.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) yeast (b) cooking oil (c) honey (d) a spoon
13. 13.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🔍 What do you see after pouring honey, water and oil into one glass? (a) bubbles of gas (b) three separate layers (c) the glass gets hot (d) one mixed colour
15. 15.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a battery cell (b) a tub of water (c) a towel for spills (d) a results table
16. 16.🛟 What should you do after handling food colour? (a) lick your fingers (b) wash your hands (c) wipe them on walls (d) rub your eyes
17. 17.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a magnet (c) a clear glass of water (d) a mirror
18. 18.True or false: a bicycle pump works by magnetism. (a) False (b) True
19. 19.True or false: a mirror is not needed for the balloon rocket. (a) True (b) False
20. 20.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a roof edge (c) from your raised hand (d) a wobbly chair
21. 21.🔍 Which is the odd one out? (a) a metal key (b) a cork (c) a pebble (d) a coin
22. 22.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
23. 23.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a balloon (c) a paper clip (d) a strip of paper
24. 24.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
25. 25.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) forward (b) straight down (c) it stays still (d) backward
26. 26.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
27. 27.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) a strip of paper (c) a pencil (d) a magnet
28. 28.True or false: a sugar cube lets water climb up it. (a) True (b) False
29. 29.True or false: a tub of water is needed for the float-or-sink test. (a) False (b) True
30. 30.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
32. 32.🛟 Which of these floats on water? (a) an empty capped bottle (b) a glass marble (c) a steel spoon (d) a coin
33. 33.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a tall clear glass (c) a magnet (d) water with food colour
34. 34.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.🧺 Which of these is not needed for the water cycle bowl? (a) cling film (b) a big bowl (c) yeast (d) ice cubes
36. 36.🌈 In VIBGYOR, what number colour is yellow?
37. 37.True or false: a flower stem lets water climb up it. (a) True (b) False
38. 38.💧 Which of these lets water climb up it? (a) a glass marble (b) a piece of foil (c) a sugar cube (d) a plastic ruler
39. 39.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) the same (b) faster (c) slower (d) not at all
40. 40.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they fall off at once (b) they turn two colours (c) they all turn green (d) they stay white

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