Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 565 · 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.⚖️ 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 amount of water (b) brightness of rainbow (c) the time of day
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a towel (d) a balloon
3. 3.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) warm water (c) a balloon (d) sugar
4. 4.True or false: a magnet is not needed for the balloon rocket. (a) True (b) False
5. 5.🔮 Predict: the string slopes uphill. What happens? (a) it travels less far (b) it speeds up (c) it travels farther (d) it goes backward first
6. 6.🧺 Which of these is needed for the balloon rocket? (a) a drinking straw (b) a battery cell (c) a mirror (d) vinegar
7. 7.💧 Which change is this: dew on morning grass? (a) condensation (b) freezing (c) melting (d) evaporation
8. 8.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) neither of them (b) the sugar cube (c) both the same (d) powdered sugar
9. 9.🔍 Which is the odd one out? (a) honey (b) very salty water (c) air (d) a pebble
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the amount of water (b) the same white paper (c) brightness of rainbow (d) the same glass
11. 11.True or false: a bicycle pump works by magnetism. (a) True (b) False
12. 12.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they turn two colours (c) they all turn green (d) they fall off at once
13. 13.🔍 Which is the odd one out? (a) a stone (b) a crumpled paper ball (c) a glass marble (d) a fluff of cotton
14. 14.True or false: turmeric powder is needed for the float-or-sink test. (a) True (b) False
15. 15.🥄 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
16. 16.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it floats away (c) it turns all red (d) it turns brighter
17. 17.True or false: turmeric powder is not needed for the coloured flower experiment. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) very salty water (b) a pebble (c) cooking oil (d) a coin
19. 19.🧺 Do we need turmeric powder for the density tower? (a) needed (b) not needed
20. 20.🧺 Do we need a mirror for the float-or-sink test? (a) not needed (b) needed
21. 21.🥄 Which of these dissolves slower? (a) sugar in warm water (b) sugar stirred well (c) powdered sugar (d) sugar in icy water
22. 22.True or false: cooking oil is not needed for the density tower. (a) True (b) False
23. 23.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) a clock or timer (c) cotton wool (d) warm water
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we keep it the same (c) we measure it
25. 25.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the way we turn it (b) how full the glass is (c) whether the card stays (d) the same card
27. 27.True or false: turmeric powder is needed for the balloon rocket. (a) True (b) False
28. 28.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
29. 29.🔍 Which is the odd one out? (a) very salty water (b) honey (c) a cork (d) a coin
30. 30.🍯 Which of these is denser than water? (a) a cork (b) a ping-pong ball (c) an ice cube (d) a pebble
31. 31.True or false: a tall clear glass is not needed for the density tower. (a) True (b) False
32. 32.⚖️ 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 the one thing we change. (a) True (b) False
33. 33.🧺 Which of these is needed for the float-or-sink test? (a) turmeric powder (b) a tub of water (c) a mirror (d) a magnet
34. 34.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
35. 35.🛟 How should you check if the sugar has dissolved? (a) smell it closely (b) look for leftover grains (c) poke it with a finger (d) taste it
36. 36.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) a sheet of glass (b) the flat sheet (c) neither of them (d) the crumpled ball
37. 37.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
38. 38.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
39. 39.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) faster (b) slower (c) the same (d) not at all
40. 40.True or false: a mirror is needed for the water cycle bowl. (a) False (b) True

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