Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 521 · 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 is not needed for the water cycle bowl? (a) cling film (b) a battery cell (c) ice cubes (d) a big bowl
2. 2.🛟 What should you do with popped balloon pieces? (a) chew them (b) give them to a baby (c) throw them away safely (d) keep them in your mouth
3. 3.⚖️ 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) how much of each liquid (c) the order of the layers (d) the order of pouring
4. 4.True or false: two chairs is not needed for the balloon rocket. (a) True (b) False
5. 5.🛟 Who should trim the flower stem? (a) a pet (b) anyone, without looking (c) a grown-up (d) a toddler
6. 6.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is the one thing we change. (a) True (b) False
7. 7.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) snow falling (c) a small rainbow (d) a magnet
8. 8.🔮 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) it turns to ice (d) the water increases
9. 9.🥄 Which of these dissolves faster? (a) sugar in warm water (b) sugar left unstirred (c) a big sugar cube (d) sugar in icy water
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is what we measure. (a) False (b) True
11. 11.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
12. 12.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) how big we blow it (b) distance it travels (c) the same tape (d) the same string
13. 13.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.True or false: a battery cell is needed for the float-or-sink test. (a) True (b) False
15. 15.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) turmeric powder (c) a sheet of white paper (d) a balloon
16. 16.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) small test objects (d) a battery cell
17. 17.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
18. 18.True or false: a steel spoon floats on water. (a) False (b) True
19. 19.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the glass is painted (c) water splits the light (d) the water is coloured
20. 20.True or false: a battery cell is needed for the density tower. (a) False (b) True
21. 21.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the water turns solid (b) some stays undissolved (c) the sugar turns to salt (d) all of it dissolves
23. 23.True or false: an ice-cream stick sinks in water. (a) True (b) False
24. 24.True or false: sugar stirred well dissolves slower. (a) True (b) False
25. 25.True or false: an ice-cream stick floats on water. (a) False (b) True
26. 26.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
27. 27.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a results table (c) a tub of water (d) a balloon
28. 28.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
29. 29.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
30. 30.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it can pop loudly (c) it changes colour (d) it turns into a kite
31. 31.⚖️ 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 keep it the same (b) we measure it (c) we change it
32. 32.True or false: a piece of foil lets water climb up it. (a) False (b) True
33. 33.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
34. 34.🧺 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) turmeric powder (d) a results table
35. 35.🔮 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
36. 36.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) a few ice cubes (c) more plain water (d) lots of salt stirred in
37. 37.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a vacuum cleaner
38. 38.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) the rainbow fades (c) it turns brighter (d) it turns all red
39. 39.🍯 Which of these is less dense than water? (a) a ping-pong ball (b) a pebble (c) a glass marble (d) honey
40. 40.True or false: sugar stirred well dissolves faster. (a) True (b) False

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