Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 545 · 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: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
2. 2.⚖️ 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
3. 3.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) time to dissolve (b) the amount of water (c) the water temperature (d) the amount of sugar
4. 4.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) a battery cell (c) a mirror (d) a magnet
5. 5.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) a drinking straw (c) a mirror (d) two chairs
6. 6.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.🥄 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
8. 8.🧺 Which of these is not needed for the density tower? (a) a spoon (b) a tall clear glass (c) a mirror (d) water with food colour
9. 9.🧺 Do we need a battery cell for the float-or-sink test? (a) not needed (b) needed
10. 10.🧺 Which of these is needed for the balloon rocket? (a) a mirror (b) a long string (c) turmeric powder (d) a battery cell
11. 11.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) more plain water (c) a few ice cubes (d) lots of salt stirred in
12. 12.🥄 Which of these dissolves slower? (a) sugar in icy water (b) powdered sugar (c) sugar stirred well (d) sugar in warm water
13. 13.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.True or false: a drinking straw is not needed for the balloon rocket. (a) True (b) False
15. 15.True or false: a pond icing over is condensation. (a) False (b) True
16. 16.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) how big we blow it (b) the same tape (c) distance it travels (d) the same straw
17. 17.🧺 Do we need honey for the density tower? (a) needed (b) not needed
18. 18.🧺 Do we need a mirror for the dissolving test? (a) not needed (b) needed
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a mirror (d) a glass of water
20. 20.True or false: sugar stirred well dissolves faster. (a) True (b) False
21. 21.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a spoon (c) a tall clear glass (d) a battery cell
22. 22.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to hide the corks (c) to win a prize (d) to splash everyone
23. 23.⚖️ 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) whether the card stays (b) the same card (c) how full the glass is (d) the same glass
24. 24.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) turmeric powder (c) safety scissors (d) a ruler
25. 25.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they mix for ever (c) they turn to honey (d) they separate again
26. 26.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the kind of clay (b) the shape of the clay (c) whether it floats (d) the amount of clay
27. 27.True or false: yeast is needed for the density tower. (a) True (b) False
28. 28.🍯 Which of these is less dense than water? (a) cooking oil (b) honey (c) a pebble (d) very salty water
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a sink or a bucket (d) a stiff postcard
30. 30.🍯 Which of these is less dense than water? (a) honey (b) a coin (c) a ping-pong ball (d) a glass marble
31. 31.💧 Why do water drops form on the outside of a glass of ice water? (a) vapour in air cools (b) the glass leaks (c) the glass sweats (d) ice escapes the glass
32. 32.True or false: a comb is not needed for the dissolving test. (a) True (b) False
33. 33.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
34. 34.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a clear glass of water (c) a balloon (d) bright sunlight
35. 35.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a mirror (c) a tall clear glass (d) cooking oil
36. 36.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of the layers”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.True or false: a mirror is needed for the balloon rocket. (a) False (b) True
38. 38.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
39. 39.🔍 Which is the odd one out? (a) a feather (b) a ping-pong ball (c) a glass marble (d) an ice cube
40. 40.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of pouring”? (a) we measure it (b) we change it (c) we keep it the same

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