Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 19 · 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 does not dissolve in water? (a) table salt (b) sawdust (c) food colour (d) baking soda
2. 2.True or false: a fluff of cotton falls slowly through the air. (a) False (b) True
3. 3.🧺 Do we need a battery cell for the water cycle bowl? (a) not needed (b) needed
4. 4.🔍 Which is the odd one out? (a) glucose powder (b) table salt (c) cooking oil (d) food colour
5. 5.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same tape (b) distance it travels (c) how big we blow it (d) the same string
6. 6.🌦️ To see a rainbow in the sky, where must the Sun be? (a) under the ground (b) straight above you (c) in front of you (d) behind you
7. 7.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) turmeric powder (b) a results table (c) a tub of water (d) small test objects
8. 8.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) the water increases (b) some water evaporates (c) it turns to salt (d) it turns to ice
9. 9.💧 Which of these is melting? (a) drops under a pot lid (b) drops on a cold glass (c) ice becoming water (d) wet clothes drying
10. 10.🔍 Sand is stirred into water. What do you see after a while? (a) it turns blue (b) it dissolves (c) it floats up (d) it settles at the bottom
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the same white paper (b) the same glass (c) the amount of water (d) the same window
12. 12.True or false: a puddle drying up is melting. (a) False (b) True
13. 13.🔍 Which is the odd one out? (a) sawdust (b) sand (c) glucose powder (d) small pebbles
14. 14.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we keep it the same (b) we change it (c) we measure it
15. 15.📘 What does “dense” mean? (a) very colourful (b) very thin (c) very hot (d) heavy for its size
16. 16.🧺 Which of these is not needed for the dissolving test? (a) a clock or timer (b) honey (c) sugar (d) a teaspoon
17. 17.🌈 How many colours do we name in a rainbow (VIBGYOR)?
18. 18.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the water turns red (b) more drops form (c) fewer drops form (d) the bowl freezes
19. 19.🛟 Which of these floats on water? (a) a metal key (b) a coin (c) a piece of thermocol (d) a steel spoon
20. 20.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
21. 21.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) the same string (c) how big we blow it
22. 22.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) more friction, less far (c) it goes faster (d) no change at all
23. 23.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
24. 24.🛟 Which of these floats on water? (a) a pebble (b) an ice cube (c) a coin (d) an iron nail
25. 25.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a fridge magnet (c) a magnetic chess set (d) a magnetic pin holder
26. 26.True or false: water with food colour is not needed for the density tower. (a) True (b) False
27. 27.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) magnets (c) clouds (d) prisms
29. 29.🧺 Do we need vinegar for the balloon rocket? (a) needed (b) not needed
30. 30.🔍 Which is the odd one out? (a) making ice lollies (b) drops on a cold glass (c) drops under a pot lid (d) dew on morning grass
31. 31.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the drop height (b) time to reach the floor (c) the length of the blades (d) the paper clip
32. 32.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) stare at the Sun (c) never look at the Sun (d) look at it through glass
33. 33.🧺 Which of these is not needed for the balloon rocket? (a) vinegar (b) a drinking straw (c) a long string (d) a balloon
34. 34.🔍 Which is the odd one out? (a) wet hair drying (b) ice becoming water (c) butter going runny (d) snow turning to water
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
36. 36.🛟 Why should we wipe up spilled oil at once? (a) oil attracts magnets (b) spilled oil is slippery (c) oil makes it rain (d) oil turns into honey
37. 37.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a ruler (c) yeast (d) a paper clip
38. 38.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a magnet (b) two chairs (c) a drinking straw (d) a balloon
39. 39.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) turmeric powder (c) a strip of paper (d) safety scissors
40. 40.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) a small cup (c) a mirror (d) water

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