Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 827 · 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.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to win a prize (d) to keep children safe
2. 2.🧺 Do we need sticky tape for the balloon rocket? (a) not needed (b) needed
3. 3.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) throw the glass (c) taste each layer (d) pour it on the floor
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.💧 Which of these is melting? (a) a misty bathroom mirror (b) wet hair drying (c) butter going runny (d) making ice lollies
6. 6.🔍 Which is the odd one out? (a) honey (b) a pebble (c) air (d) a glass marble
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
8. 8.🔍 How can you get the salt back from salty water? (a) stir it more (b) add more water (c) keep it in a fridge (d) let the water evaporate
9. 9.🔍 Which is the odd one out? (a) a cork (b) an ice-cream stick (c) a pebble (d) a dry leaf
10. 10.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) bright sunlight (c) a magnet (d) a clear glass of water
11. 11.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) food colour (c) a few hours of waiting (d) a mirror
12. 12.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we measure it (b) we change it (c) we keep it the same
13. 13.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) no colour change (c) the flower glows (d) the petals turn red
14. 14.🌼 Why do the petals keep pulling water up the stem? (a) the stem is hot (b) petals like colour (c) petals lose water to air (d) petals are magnetic
15. 15.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
16. 16.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) glucose powder (d) sand
17. 17.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.⚖️ 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 measure it (b) we keep it the same (c) we change it
19. 19.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) forward (c) it stays still (d) backward
20. 20.💧 Which change is this: snow turning to water? (a) freezing (b) condensation (c) melting (d) evaporation
21. 21.True or false: wet clothes drying is condensation. (a) True (b) False
22. 22.🧺 Which of these is needed for the balloon rocket? (a) a magnet (b) a balloon (c) turmeric powder (d) a battery cell
23. 23.🧺 Which of these is not needed for the coloured flower experiment? (a) a mirror (b) a few hours of waiting (c) a glass of water (d) food colour
24. 24.🔍 Which is the odd one out? (a) an iron nail (b) a steel spoon (c) a dry leaf (d) a metal key
25. 25.True or false: food colour dissolves in water. (a) True (b) False
26. 26.True or false: a paper towel lets water climb up it. (a) False (b) True
27. 27.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water can scald (c) hot water is magnetic (d) hot water is heavy
28. 28.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil turns into honey (c) spilled oil is slippery (d) oil attracts magnets
29. 29.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.🥄 Why does sugar dissolve faster in warm water? (a) cold water is wet (b) warm water is thicker (c) particles move faster (d) sugar likes the dark
31. 31.🥄 Which of these does not dissolve in water? (a) table salt (b) glucose powder (c) sawdust (d) sugar
32. 32.🔮 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 honey layer (d) in the water layer
33. 33.🧺 Which of these is not needed for the water cycle bowl? (a) a small cup (b) a big bowl (c) water (d) a mirror
34. 34.⚖️ 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 pouring is what we measure. (a) False (b) True
35. 35.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) a battery cell (d) a sunny window
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a stiff postcard (d) a glass of water
37. 37.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) a teaspoon (c) a magnet (d) warm water
38. 38.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) sugar (c) cotton wool (d) a clock or timer
39. 39.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a glass of water (c) food colour (d) a balloon
40. 40.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the same three liquids (b) the order of the layers (c) the same glass (d) the order of pouring

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