3 Part Cards -Kinds of Rocks

8/8/2019 3 Part Cards -Kinds of Rocks

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.Smooth, black andglassy. An igneous

rock with very sharpedges formed whereit has been broken.

Very useful formaking cutting

tools .

Obsidian Obsidian

Rough, light grey,and full of holes. Anigneous rock that isvery light because it

is full of gas bubbles.

A rock that can floaton water!

Pumice Pumice


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Rough, blue-grey, with amixture of small and

larger crystals. Anigneous rock formed fromcooled lava. Also known

as Bluestone, it is avery useful building

material.

Basalt Basalt

Very obvious white,black and pink crystals.An igneous rock formed

from cooled magma.Beautiful when

polished, it is used formemorials likegravestones.

Granite Granite


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Brown and lookingvery smelly. Formedwhen lava has been

extruded throughnarrow openings. It

doesnt matter if youstep in this igneousdoggy-do, because

its rock hard!

Ropy LavaRopy Lava

A mixture of sand andpebbles cemented

together. Thissedimentary rock wasformed when a strong

flood washed out allsizes of material .

Conglomerate Conglomerate


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.Dark grey with veryfine crystals. This

metamorphic rock hasformed from siltstone

that was originallyblack oozy mud found

in swamps.

Shale Shale

Light coloured and verycrumbly. This

sedimentary rock isquite young and has not

had time to cementtogether properly, so itis too soft and weak to

be of any use to us.

SiltstoneSiltstone


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Yellow, with obvioussand-sized crystals

cemented together. The

most commonsedimentary rock, it isstill being formed today

wherever a river is spillingsilty water into the sea.

.

Sandstone Sandstone

Mud-coloured withobvious layers. This

sedimentary rock showshow floods have

washed through avariety of landscapes,

depositing slightlydifferent sands each

time.

Layered SandstoneLayered Sandstone


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Creamy coloured andoften full of fossil

shells. Thissedimentary rock

formed from layers ofcalcareous materialfloating down fromdead, shelled seacreatures above.

.

Limestone Limestone

Pure white and verysoft. When layers oftiny shells rain downonto the sea bed in

clean water, thissedimentary rock

results. A teachersbest friend before

whiteboards!

Chalk Chalk


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. Light coloured and withan obvious cell structure.This sedimentary rock is

the fossilised remains ofcalcium carbonate that

has been organised by acolony of sea creatures

called polyps.

CoralCoral

Pink and crystalline.This sedimentary rock

formed when an ancientsea full of red algaeevaporated. Crushed

up, it will end up fromdining room tables toaluminium smelters!

Rock saltRock salt


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Bluish and crystalline, withdelicate lines and patterns.

This rock has

metamorphosed fromlimestone under great

pressure and heat. Highlyvalued for decorating

buildings and bathrooms

MarbleMarble

White and crystalline. Thisrock has metamorphosed

from sandstone.Extremely hard, and when

the pressure has been

high enough, it can be aclear crystal.

QuartziteQuartzite


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Obsidian Basalt

Pumice Granite


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Ropy LavaConglomerate

Layered SandstoneChalk


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Shale Sandstone

MarbleQuartzite


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Limestone Siltstone

CoralRock salt


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3 Part Cards -Kinds of Rocks