Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 831 · 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 floats on water? (a) a pebble (b) an ice-cream stick (c) a glass marble (d) a coin
2. 2.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is kept the same. (a) False (b) True
3. 3.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
4. 4.True or false: a drinking straw works by air pressure. (a) True (b) False
5. 5.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a balloon (c) small test objects (d) a results table
6. 6.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) slower (b) faster (c) they turn to ice (d) they never dry
7. 7.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) backward (b) it stays still (c) straight down (d) forward
8. 8.🛟 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
9. 9.🛟 How should you check if the sugar has dissolved? (a) look for leftover grains (b) taste it (c) smell it closely (d) poke it with a finger
10. 10.🚁 Which of these falls fast through the air? (a) a feather (b) a toy parachute (c) a steel spoon (d) a fluff of cotton
11. 11.💧 Why do water drops form on the outside of a glass of ice water? (a) vapour in air cools (b) the glass sweats (c) ice escapes the glass (d) the glass leaks
12. 12.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a glass of water (c) a few hours of waiting (d) a magnet
13. 13.⚖️ 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 measure it (b) we keep it the same (c) we change it
14. 14.🥄 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.🧺 Do we need a battery cell for the water cycle bowl? (a) not needed (b) needed
17. 17.True or false: a balloon is not needed for the balloon rocket. (a) False (b) True
18. 18.True or false: the rowing boat goes forward. (a) False (b) True
19. 19.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a compass needle (c) a suction hook (d) a drinking straw
20. 20.🚁 Dropped from a raised hand, does an open sheet of paper fall slowly or fast? (a) falls slowly (b) falls fast
21. 21.⚖️ 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
22. 22.📘 What pulls the paper helicopter down to the floor? (a) air pressure (b) magnetism (c) the wind (d) gravity
23. 23.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.True or false: bright sunlight is needed for the water rainbow. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) a misty bathroom mirror (b) wet hair drying (c) drops under a pot lid (d) dew on morning grass
26. 26.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.📘 What is the push of air on a falling thing called? (a) magnetism (b) floating (c) dissolving (d) air resistance
28. 28.🧺 Which of these is not needed for the water cycle bowl? (a) water (b) ice cubes (c) a big bowl (d) a balloon
29. 29.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same three liquids”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) the rainbow fades (d) it turns brighter
31. 31.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a battery cell (c) a sunny window (d) bright sunlight
32. 32.🧺 Do we need a balloon for the density tower? (a) not needed (b) needed
33. 33.🔍 Which is the odd one out? (a) drops under a pot lid (b) a misty bathroom mirror (c) a puddle drying up (d) drops on a cold glass
34. 34.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) never look at the Sun (c) look at it in a mirror (d) look at it through glass
35. 35.💧 Which of these does not let water climb? (a) a cotton thread (b) a steel spoon (c) a paper towel (d) a flower stem
36. 36.🚁 Which of these falls slowly through the air? (a) a crumpled paper ball (b) a coin (c) a stone (d) a fluff of cotton
37. 37.🍯 Is a coin denser or less dense than water? (a) denser than water (b) less dense than water
38. 38.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the amount of water (c) the water temperature
39. 39.🍯 Why does honey sink to the bottom of the glass? (a) it is yellow (b) it is the coldest (c) it is the stickiest (d) it is the densest
40. 40.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we measure it (b) we change it (c) we keep it the same

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