Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 320 · 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 balloon is needed for the float-or-sink test. (a) False (b) True
2. 2.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) the amount of water (b) the cling film cover (c) how many drops form (d) sun or shade
3. 3.🔍 Which is the odd one out? (a) a ping-pong ball (b) an ice cube (c) a coin (d) air
4. 4.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a grown-up (c) a toddler (d) a pet
5. 5.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a wobbly chair (c) a roof edge (d) from your raised hand
6. 6.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
7. 7.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) two chairs (c) a battery cell (d) a drinking straw
8. 8.📘 What does “dense” mean? (a) very colourful (b) very hot (c) very thin (d) heavy for its size
9. 9.🛟 Does a coin float or sink in water? (a) sinks (b) floats
10. 10.🧺 Do we need a mirror for the balloon rocket? (a) not needed (b) needed
11. 11.💧 Which change is this: butter going runny? (a) melting (b) evaporation (c) freezing (d) condensation
12. 12.⚖️ 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 way we turn it (c) the same glass (d) the same card
13. 13.🛟 Which of these floats on water? (a) a glass marble (b) a pebble (c) a steel spoon (d) a piece of thermocol
14. 14.🧺 Do we need a magnet for the water cycle bowl? (a) needed (b) not needed
15. 15.🛟 How should you check if the sugar has dissolved? (a) taste it (b) poke it with a finger (c) smell it closely (d) look for leftover grains
16. 16.🧺 Do we need a results table for the float-or-sink test? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a mirror (b) a tub of water (c) a towel for spills (d) small test objects
18. 18.True or false: the rocket goes backward. (a) True (b) False
19. 19.🧺 Do we need a small cup for the water cycle bowl? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for the float-or-sink test? (a) turmeric powder (b) a tub of water (c) a magnet (d) a battery cell
21. 21.🧺 Do we need sunlight for the water cycle bowl? (a) needed (b) not needed
22. 22.🔍 Which is the odd one out? (a) wet clothes drying (b) sweat drying on skin (c) a puddle drying up (d) drops on a cold glass
23. 23.💧 Which change is this: making ice lollies? (a) condensation (b) melting (c) evaporation (d) freezing
24. 24.🎈 When does the balloon rocket stop? (a) it never stops (b) when it turns blue (c) when the air runs out (d) when it gets cold
25. 25.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is the one thing we change. (a) False (b) True
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) backward (b) it stays still (c) forward (d) straight down
28. 28.⚖️ 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 measure it (b) we keep it the same (c) we change it
29. 29.💧 Which of these lets water climb up it? (a) a strip of cloth (b) a rubber eraser (c) a glass marble (d) a plastic ruler
30. 30.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) run around the tub (c) play near a deep pond (d) wipe up spills at once
31. 31.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) clouds (c) magnets (d) balloons
33. 33.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is kept the same. (a) True (b) False
34. 34.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) turmeric powder (c) yeast (d) safety scissors
35. 35.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
36. 36.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a fluff of cotton (b) an open sheet of paper (c) a steel spoon (d) a paper helicopter
38. 38.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
39. 39.💧 Which of these is melting? (a) dew on morning grass (b) snow turning to water (c) a puddle drying up (d) wet clothes drying
40. 40.🔍 Which is the odd one out? (a) a sugar cube (b) a steel spoon (c) a piece of foil (d) a plastic ruler

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