Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 440 · 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.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes less far (b) it goes much farther (c) it turns into a kite (d) it flies off the string
2. 2.🍯 Which of these is less dense than water? (a) a pebble (b) very salty water (c) a coin (d) a cork
3. 3.🔍 Which is the odd one out? (a) a pebble (b) a coin (c) a steel spoon (d) a piece of thermocol
4. 4.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) a results table (c) a tub of water (d) a towel for spills
5. 5.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the kind of sugar (b) the stirring (c) the amount of sugar (d) the water temperature
6. 6.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) small test objects (c) a battery cell (d) a towel for spills
8. 8.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the water layer (b) on top of the oil (c) in the oil layer (d) at the very bottom
9. 9.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) how big we blow it (b) the slope of the string (c) distance it travels
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is kept the same. (a) False (b) True
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
13. 13.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) a magnet (c) a few hours of waiting (d) a battery cell
14. 14.💧 Which of these does not let water climb? (a) a steel spoon (b) a flower stem (c) a piece of chalk (d) a paper towel
15. 15.True or false: sugar is not needed for the dissolving test. (a) True (b) False
16. 16.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
17. 17.🧺 Do we need a magnet for the balloon rocket? (a) needed (b) not needed
18. 18.🔍 Which is the odd one out? (a) an open sheet of paper (b) a feather (c) a fluff of cotton (d) a glass marble
19. 19.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it spread in the water (b) it became air (c) it vanished for ever (d) it sank as sand
20. 20.🧺 Which of these is needed for the balloon rocket? (a) vinegar (b) two chairs (c) a mirror (d) yeast
21. 21.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) a shadow of ice (d) snow falling
22. 22.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes backward (b) goes forward
23. 23.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.True or false: a white flower is needed for the coloured flower experiment. (a) True (b) False
25. 25.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) bright sunlight (d) turmeric powder
26. 26.🔍 Which is the odd one out? (a) a steel spoon (b) a glass marble (c) a crumpled paper ball (d) a feather
27. 27.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a grown-up (c) a toddler (d) a pet
28. 28.True or false: a mirror is not needed for the water rainbow. (a) True (b) False
29. 29.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) small test objects (c) a mirror (d) a results table
30. 30.🔍 Which is the odd one out? (a) drops on a cold glass (b) dew on morning grass (c) a misty bathroom mirror (d) sweat drying on skin
31. 31.🔍 Which is the odd one out? (a) a flower stem (b) a cotton thread (c) a steel spoon (d) a piece of chalk
32. 32.🌈 How many colours do we name in a rainbow (VIBGYOR)?
33. 33.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
35. 35.🛟 What should you do with popped balloon pieces? (a) keep them in your mouth (b) chew them (c) throw them away safely (d) give them to a baby
36. 36.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) two clear glasses (c) a balloon (d) a teaspoon
37. 37.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
38. 38.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
39. 39.True or false: a coin is denser than water. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a paper helicopter (b) a feather (c) a stone (d) an open sheet of paper

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