Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 291 · 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: air from the balloon goes forward. (a) True (b) False
2. 2.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) the water increases (c) it turns to salt (d) some water evaporates
3. 3.True or false: a clock or timer is not needed for the dissolving test. (a) False (b) True
4. 4.🛟 Which of these floats on water? (a) a pebble (b) a feather (c) an iron nail (d) a steel spoon
5. 5.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🧺 Do we need a magnet for the paper helicopter? (a) not needed (b) needed
7. 7.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
8. 8.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is kept the same. (a) True (b) False
9. 9.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the oil layer (b) on top of the oil (c) at the very bottom (d) in the water layer
10. 10.💧 Which change is this: wet clothes drying? (a) condensation (b) freezing (c) evaporation (d) melting
11. 11.🌦️ To see a rainbow in the sky, where must the Sun be? (a) under the ground (b) in front of you (c) straight above you (d) behind you
12. 12.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) the time we wait (c) how many drops form
13. 13.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a medicine dropper (c) a compass needle (d) a fridge magnet
14. 14.🧺 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 magnet
15. 15.🛟 Does a feather float or sink in water? (a) floats (b) sinks
16. 16.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
17. 17.🧺 Do we need a magnet for the balloon rocket? (a) not needed (b) needed
18. 18.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a magnet (c) a balloon (d) a drinking straw
19. 19.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the water temperature (c) the stirring
20. 20.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is kept the same. (a) False (b) True
21. 21.True or false: a tub of water is not needed for the float-or-sink test. (a) False (b) True
22. 22.🧺 Which of these is needed for the paper helicopter? (a) a paper clip (b) a balloon (c) a magnet (d) turmeric powder
23. 23.🚁 Dropped from a raised hand, does a coin fall slowly or fast? (a) falls fast (b) falls slowly
24. 24.🌊 What pushes a floating cork upward? (a) the air above (b) the tub (c) the water (d) the cork itself
25. 25.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
26. 26.True or false: a misty bathroom mirror is condensation. (a) True (b) False
27. 27.🛟 Does a metal key float or sink in water? (a) sinks (b) floats
28. 28.🔍 Which is the odd one out? (a) honey (b) an ice cube (c) a ping-pong ball (d) air
29. 29.True or false: an open sheet of paper falls slowly through the air. (a) True (b) False
30. 30.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) pour more water (c) wipe them dry (d) slide on them
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a glass of water (d) a balloon
32. 32.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a grown-up (c) a toddler (d) a pet
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a glass of water (d) a stiff postcard
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 the one thing we change. (a) False (b) True
35. 35.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is the one thing we change. (a) True (b) False
36. 36.🛟 Why should we wipe up spilled oil at once? (a) oil attracts magnets (b) spilled oil is slippery (c) oil makes it rain (d) oil turns into honey
37. 37.🧺 Which of these is not needed for the density tower? (a) water with food colour (b) cooking oil (c) honey (d) a magnet
38. 38.True or false: a clock or timer is needed for the dissolving test. (a) True (b) False
39. 39.🧺 Do we need a tub of water for the float-or-sink test? (a) needed (b) not needed
40. 40.🔍 Which is the odd one out? (a) water becoming ice (b) a pond icing over (c) making ice lollies (d) wet clothes drying

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