Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 614 · 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 goes backward? (a) the rowing boat (b) the balloon (c) water from the oars (d) the rocket
2. 2.💧 Which change is this: drops on a cold glass? (a) evaporation (b) freezing (c) condensation (d) melting
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) a balloon (d) a towel
4. 4.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
5. 5.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a battery cell (b) a results table (c) small test objects (d) a tub of water
6. 6.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
7. 7.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) cling film (c) a small cup (d) a balloon
8. 8.🍯 Is very salty water denser or less dense than water? (a) less dense than water (b) denser than water
9. 9.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the card stays on (d) the glass breaks
10. 10.🧺 Which of these is not needed for the float-or-sink test? (a) a results table (b) a tub of water (c) a towel for spills (d) turmeric powder
11. 11.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) turmeric powder (b) sunlight (c) ice cubes (d) water
12. 12.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
13. 13.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) throw the glass (c) pour it on the floor (d) taste each layer
14. 14.⚖️ 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 amount of water (b) the same glass (c) brightness of rainbow (d) the time of day
15. 15.⚖️ 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) time for colour to show (b) the room it stands in (c) the length of the stem (d) the amount of colour
16. 16.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) never look at the Sun (c) look at it in a mirror (d) look at it through glass
17. 17.🔍 Which is the odd one out? (a) a steel spoon (b) a coin (c) a ball of clay (d) a piece of thermocol
18. 18.💧 Which of these does not let water climb? (a) a cotton thread (b) a strip of cloth (c) a rubber eraser (d) a paper towel
19. 19.True or false: a big sugar cube dissolves faster. (a) True (b) False
20. 20.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a mirror (b) a balloon (c) a long string (d) two chairs
21. 21.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they mix for ever (c) they separate again (d) they turn to honey
22. 22.💧 Which of these is melting? (a) water becoming ice (b) a pond icing over (c) wet hair drying (d) butter going runny
23. 23.🧺 Which of these is needed for the float-or-sink test? (a) turmeric powder (b) a results table (c) a balloon (d) a magnet
24. 24.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) turmeric powder (c) a sunny window (d) bright sunlight
25. 25.🧺 Which of these is not needed for the density tower? (a) cooking oil (b) a tall clear glass (c) a spoon (d) a battery cell
26. 26.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) some stays undissolved (b) all of it dissolves (c) the water turns solid (d) the sugar turns to salt
27. 27.🥄 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) small pebbles (d) food colour
28. 28.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the stirring (b) time to dissolve (c) the water temperature
29. 29.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of the layers is what we measure. (a) True (b) False
30. 30.⚖️ 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
31. 31.⚖️ 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 “the same three liquids”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.🔍 Which is the odd one out? (a) food colour (b) small pebbles (c) sugar (d) glucose powder
33. 33.💧 Which change is this: making ice lollies? (a) evaporation (b) melting (c) freezing (d) condensation
34. 34.💧 Which of these does not let water climb? (a) a plastic ruler (b) a flower stem (c) a cotton thread (d) a paper towel
35. 35.True or false: dew on morning grass is condensation. (a) False (b) True
36. 36.⚖️ 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 time of day (b) the amount of water (c) brightness of rainbow
37. 37.🌈 In VIBGYOR, what number colour is violet?
38. 38.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a medicine dropper (d) a fridge magnet
39. 39.True or false: a stone falls fast through the air. (a) True (b) False
40. 40.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) water splits the light (c) the paper makes colours (d) the water is coloured

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