Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 150 · 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.True or false: a steel spoon falls fast through the air. (a) False (b) True
2. 2.True or false: the swimmer goes forward. (a) True (b) False
3. 3.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.🔍 Which layer is on top in the honey-water-oil tower? (a) coloured water (b) honey (c) the spoon (d) cooking oil
5. 5.True or false: a fridge magnet works by magnetism. (a) False (b) True
6. 6.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) turmeric powder (c) a tub of water (d) a results table
7. 7.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the time we wait is the one thing we change. (a) False (b) True
8. 8.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) a battery cell (c) a pencil (d) safety scissors
9. 9.True or false: a mirror is not needed for the water rainbow. (a) False (b) True
10. 10.🧺 Do we need a battery cell for the paper helicopter? (a) not needed (b) needed
11. 11.🌈 How many colours do we name in a rainbow (VIBGYOR)?
12. 12.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) cold water (c) a teaspoon (d) a magnet
13. 13.True or false: warm water is not needed for the dissolving test. (a) True (b) False
14. 14.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) it floats away (d) the rainbow fades
15. 15.🔍 What do you see after pouring honey, water and oil into one glass? (a) bubbles of gas (b) three separate layers (c) one mixed colour (d) the glass gets hot
16. 16.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) two chairs (c) sticky tape (d) turmeric powder
17. 17.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a medicine dropper
18. 18.🚀 Which of these goes forward? (a) air from the balloon (b) the balloon (c) water from the oars (d) gas from the rocket
19. 19.True or false: vinegar is not needed for the balloon rocket. (a) False (b) True
20. 20.🚀 Which of these goes backward? (a) the rocket (b) the swimmer (c) water from the oars (d) the rowing boat
21. 21.🛟 What should you do after handling food colour? (a) wipe them on walls (b) wash your hands (c) rub your eyes (d) lick your fingers
22. 22.🚀 Which of these goes backward? (a) the rowing boat (b) the rocket (c) water a swimmer pushes (d) the balloon
23. 23.🧺 Which of these is needed for the density tower? (a) yeast (b) a tall clear glass (c) a magnet (d) a mirror
24. 24.🧺 Do we need turmeric powder for the paper helicopter? (a) not needed (b) needed
25. 25.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to hide the corks (c) to splash everyone (d) to keep children safe
26. 26.💧 Which change is this: wet hair drying? (a) freezing (b) condensation (c) melting (d) evaporation
27. 27.True or false: baking soda dissolves in water. (a) False (b) True
28. 28.⚖️ 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 change it (b) we measure it (c) we keep it the same
29. 29.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) pour it on the floor (c) taste each layer (d) throw the glass
30. 30.🍯 Which of these is less dense than water? (a) honey (b) a glass marble (c) very salty water (d) an ice cube
31. 31.🧺 Do we need a balloon for the water cycle bowl? (a) needed (b) not needed
32. 32.True or false: air from the balloon goes backward. (a) True (b) False
33. 33.🧺 Do we need turmeric powder for the density tower? (a) not needed (b) needed
34. 34.True or false: sticky tape is needed for the balloon rocket. (a) True (b) False
35. 35.🧊 Why does an ice cube float on water? (a) ice is less dense (b) ice is very cold (c) water is sticky (d) ice is magnetic
36. 36.True or false: a battery cell is not needed for the coloured flower experiment. (a) True (b) False
37. 37.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes backward (b) goes forward
38. 38.True or false: a flower stem does not let water climb. (a) False (b) True
39. 39.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
40. 40.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “how much of each liquid”? (a) we keep it the same (b) we measure it (c) we change it

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