Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 989 · 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.🧺 Do we need a small cup for the water cycle bowl? (a) not needed (b) needed
2. 2.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a results table (c) a mirror (d) a towel for spills
3. 3.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a towel for spills (c) a magnet (d) small test objects
4. 4.🥄 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
5. 5.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
6. 6.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it sinks (c) it still floats (d) it turns white
7. 7.🧺 Do we need honey for the density tower? (a) needed (b) not needed
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the room it stands in is what we measure. (a) False (b) True
9. 9.🧺 Do we need two clear glasses for the dissolving test? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a stiff postcard (d) a towel
11. 11.True or false: a magnet is needed for the water rainbow. (a) False (b) True
12. 12.🚁 Which of these falls slowly through the air? (a) a coin (b) a feather (c) a glass marble (d) a stone
13. 13.True or false: a misty bathroom mirror is evaporation. (a) False (b) True
14. 14.🧺 Do we need a pencil for the paper helicopter? (a) needed (b) not needed
15. 15.🛟 Which of these floats on water? (a) a steel spoon (b) a ball of clay (c) an empty capped bottle (d) an iron nail
16. 16.🔍 Which is the odd one out? (a) an iron nail (b) an ice cube (c) a feather (d) an empty capped bottle
17. 17.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it sinks faster (b) it dissolves (c) it turns to stone (d) it can float
18. 18.🚢 Why can a heavy steel ship float on the sea? (a) it has a magnet (b) sea water is warm (c) its hollow shape (d) steel is very light
19. 19.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) turmeric powder (c) a pencil (d) a ruler
20. 20.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it sinks (b) it floats higher (c) it melts (d) it turns blue
21. 21.🧺 Do we need yeast for the density tower? (a) needed (b) not needed
22. 22.🔍 Which is the odd one out? (a) a pebble (b) a glass marble (c) honey (d) cooking oil
23. 23.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it turns brighter (c) the rainbow fades (d) it floats away
24. 24.⚖️ 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) how much of each liquid (b) the same glass (c) the same three liquids (d) the order of the layers
25. 25.True or false: a big sugar cube dissolves slower. (a) False (b) True
26. 26.💧 Which of these is evaporation? (a) a puddle drying up (b) a misty bathroom mirror (c) drops under a pot lid (d) snow turning to water
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a battery cell (d) a towel
28. 28.🧺 Which of these is not needed for the float-or-sink test? (a) a mirror (b) a results table (c) a towel for spills (d) small test objects
29. 29.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) on top of the oil (b) under the honey (c) in the water layer (d) in the honey layer
30. 30.🧺 Which of these is not needed for the dissolving test? (a) cold water (b) sugar (c) a balloon (d) warm water
31. 31.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same straw (b) the same string (c) distance it travels (d) how big we blow it
32. 32.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a drinking straw (c) a long string (d) a mirror
34. 34.True or false: a metal key floats on water. (a) True (b) False
35. 35.🧺 Which of these is not needed for the float-or-sink test? (a) a magnet (b) a results table (c) small test objects (d) a towel for spills
36. 36.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it gets hot (c) so it turns blue (d) so the Sun moves
37. 37.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.🧺 Do we need small test objects for the float-or-sink test? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a battery cell (b) a white flower (c) a glass of water (d) food colour
40. 40.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we keep it the same (b) we change it (c) we measure it

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