Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 5 · 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 is the odd one out? (a) a pebble (b) honey (c) a coin (d) a ping-pong ball
2. 2.🥄 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🍯 Which of these is less dense than water? (a) very salty water (b) a coin (c) a ping-pong ball (d) honey
4. 4.True or false: a clear glass of water is needed for the water rainbow. (a) False (b) True
5. 5.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) cooking oil (c) water with food colour (d) a balloon
6. 6.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the person dropping”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a glass of water (c) a mirror (d) food colour
8. 8.True or false: yeast is not needed for the balloon rocket. (a) True (b) False
9. 9.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
10. 10.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) more drops form (c) fewer drops form (d) the water turns red
11. 11.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the shape of the clay (b) whether it floats (c) the kind of clay (d) the tub of water
12. 12.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) the rainbow fades (c) it floats away (d) it turns all red
13. 13.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is hot (c) oil is less dense (d) oil is sticky
14. 14.🥄 Which of these dissolves in water? (a) food colour (b) sawdust (c) small pebbles (d) cooking oil
15. 15.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) a balloon (d) a sunny window
16. 16.⚖️ 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) False (b) True
17. 17.True or false: a compass needle works by air pressure. (a) True (b) False
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a stiff postcard (d) a battery cell
19. 19.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) False (b) True
20. 20.True or false: a clock or timer is needed for the dissolving test. (a) True (b) False
21. 21.True or false: sugar dissolves in water. (a) True (b) False
22. 22.🥄 Does powdered sugar dissolve faster or slower? (a) faster (b) slower
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) yeast (d) a stiff postcard
24. 24.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a fridge magnet (d) a vacuum cleaner
25. 25.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a tub of water (c) a magnet (d) a towel for spills
26. 26.🌈 How many colours do we name in a rainbow (VIBGYOR)?
27. 27.🧺 Which of these is not needed for the balloon rocket? (a) a drinking straw (b) two chairs (c) a long string (d) a magnet
28. 28.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) pour it on the floor (c) throw the glass (d) do not lick the spoon
29. 29.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same tape (b) distance it travels (c) how big we blow it (d) the same string
30. 30.True or false: a results table is not needed for the float-or-sink test. (a) True (b) False
31. 31.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) some water evaporates (b) it turns to salt (c) the water increases (d) it turns to ice
32. 32.🥄 Why does sugar dissolve faster in warm water? (a) cold water is wet (b) sugar likes the dark (c) warm water is thicker (d) particles move faster
33. 33.⚖️ 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
34. 34.True or false: a pond icing over is melting. (a) False (b) True
35. 35.🧺 Do we need a battery cell for the paper helicopter? (a) needed (b) not needed
36. 36.True or false: two chairs is not needed for the balloon rocket. (a) True (b) False
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the length of the stem (c) the amount of colour
38. 38.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) chalk powder (d) food colour
39. 39.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) in the oil layer (c) in the water layer (d) at the very bottom
40. 40.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) a comb (c) warm water (d) cold water

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