Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 408 · 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.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
2. 2.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) green (c) red (d) blue
3. 3.🔍 Which is the odd one out? (a) a cork (b) a steel spoon (c) a dry leaf (d) an empty capped bottle
4. 4.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) it looks nicer (d) the card gets wet
5. 5.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a small cup (b) yeast (c) sunlight (d) cling film
6. 6.🌈 How many colours do we name in a rainbow (VIBGYOR)?
7. 7.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) at the very bottom (b) in the water layer (c) on top of the oil (d) in the oil layer
8. 8.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) melting (c) magnetism (d) capillary action
9. 9.True or false: a big sugar cube dissolves slower. (a) True (b) False
10. 10.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) yeast (c) a drinking straw (d) sticky tape
11. 11.🔍 Which is the odd one out? (a) a ping-pong ball (b) a ball of clay (c) a piece of thermocol (d) an ice-cream stick
12. 12.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) chalk powder (d) sugar
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.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a battery cell (c) a ruler (d) a strip of paper
15. 15.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is the one thing we change. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) a coin (b) a ping-pong ball (c) cooking oil (d) an ice cube
17. 17.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) turmeric powder (b) a few hours of waiting (c) a glass of water (d) a white flower
18. 18.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) True (b) False
19. 19.📘 What is the push of air on a falling thing called? (a) floating (b) air resistance (c) magnetism (d) dissolving
20. 20.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a towel for spills (c) a results table (d) a magnet
21. 21.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to drops (b) it turns to salt (c) it disappears (d) it turns to smoke
22. 22.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) honey (c) cooking oil (d) a battery cell
23. 23.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
24. 24.🧺 Which of these is needed for the water rainbow? (a) a magnet (b) a battery cell (c) turmeric powder (d) a clear glass of water
25. 25.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is magnetic (d) it is heavier
26. 26.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed
27. 27.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the length of the blades (b) the kind of paper (c) the paper clip (d) time to reach the floor
28. 28.🧺 Do we need a magnet for the density tower? (a) needed (b) not needed
29. 29.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) the water turns red (c) fewer drops form (d) more drops form
30. 30.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is what we measure. (a) False (b) True
31. 31.💧 Which of these lets water climb up it? (a) a glass marble (b) a flower stem (c) a piece of foil (d) a steel spoon
32. 32.🔍 Which is the odd one out? (a) a ping-pong ball (b) a pebble (c) a metal key (d) a coin
33. 33.True or false: a spoon is not needed for the density tower. (a) True (b) False
34. 34.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) on top of the oil (b) in the water layer (c) in the honey layer (d) under the honey
35. 35.True or false: a battery cell is needed for the paper helicopter. (a) False (b) True
36. 36.🛟 Does a cork float or sink in water? (a) sinks (b) floats
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a stiff postcard (d) a glass of water
38. 38.True or false: a cotton thread does not let water climb. (a) False (b) True
39. 39.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to cool the glass (d) to make it rain
40. 40.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) some stays undissolved (b) all of it dissolves (c) the sugar turns to salt (d) the water turns solid

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