Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 654 · 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 a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the size of the bowl (b) the amount of water (c) sun or shade (d) the time we wait
2. 2.🧺 Which of these is not needed for the dissolving test? (a) cotton wool (b) a clock or timer (c) two clear glasses (d) a teaspoon
3. 3.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it turns into a kite (c) it changes colour (d) it can pop loudly
4. 4.🥚 A fresh egg sinks in plain water. What makes it float? (a) lots of salt stirred in (b) a little shaking (c) more plain water (d) a few ice cubes
5. 5.💧 Which change is this: a pond icing over? (a) melting (b) freezing (c) condensation (d) evaporation
6. 6.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a balloon (b) a clock or timer (c) two clear glasses (d) sugar
7. 7.True or false: sugar in icy water dissolves faster. (a) True (b) False
8. 8.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the stirring (b) the amount of water (c) time to dissolve (d) the kind of sugar
9. 9.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a battery cell (c) a tall clear glass (d) honey
10. 10.🥄 Does sugar left unstirred dissolve faster or slower? (a) faster (b) slower
11. 11.🧺 Do we need a comb for the dissolving test? (a) needed (b) not needed
12. 12.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🍯 Which of these is less dense than water? (a) a coin (b) air (c) a glass marble (d) very salty water
15. 15.🛟 Does a pebble float or sink in water? (a) floats (b) sinks
16. 16.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🌈 How many colours do we name in a rainbow (VIBGYOR)?
18. 18.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
20. 20.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a drinking straw (c) a balloon (d) a mirror
21. 21.🧺 Which of these is needed for the balloon rocket? (a) vinegar (b) a mirror (c) turmeric powder (d) a drinking straw
22. 22.True or false: a fridge magnet works by air pressure. (a) True (b) False
23. 23.🥄 Which of these dissolves slower? (a) sugar in warm water (b) sugar stirred well (c) powdered sugar (d) sugar in icy water
24. 24.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the sugar turns to salt (b) the water turns solid (c) all of it dissolves (d) some stays undissolved
25. 25.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
26. 26.True or false: the rowing boat goes forward. (a) False (b) True
27. 27.🛟 Who should pour the warm water in the dissolving test? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
28. 28.True or false: turmeric powder is needed for the paper helicopter. (a) False (b) True
29. 29.🔍 Which is the odd one out? (a) honey (b) an ice cube (c) very salty water (d) a pebble
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a battery cell (d) a clear glass of water
31. 31.💧 Which change is this: sweat drying on skin? (a) freezing (b) condensation (c) melting (d) evaporation
32. 32.🚁 Why does the paper helicopter fall slowly? (a) the floor pushes it (b) it has no weight (c) a magnet holds it (d) air pushes on its blades
33. 33.🚁 Which of these falls fast through the air? (a) a toy parachute (b) a stone (c) a fluff of cotton (d) an open sheet of paper
34. 34.🧺 Do we need a big bowl for the water cycle bowl? (a) needed (b) not needed
35. 35.🥄 Why does sugar dissolve faster in warm water? (a) warm water is thicker (b) cold water is wet (c) sugar likes the dark (d) particles move faster
36. 36.⚖️ 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 keep it the same (b) we measure it (c) we change it
37. 37.🥄 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) whether the card stays (b) the same glass (c) the way we turn it (d) how full the glass is
39. 39.🔮 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
40. 40.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed

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