Rocks
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Rocks. The Life of a Rock. Layers of sediment join together. Changes are made from pressure and heat. Melted rock cools and hardens. Rocks become smaller , and smaller , and smaller , and smaller . . . By erosion By wind By earthquake By floods By rain By slides By man.

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Rocks

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Rocks

Rocks


The life of a rock

The Life of a Rock

Layers of sediment join together.

Changes are made from pressure and heat.

Melted rock cools and hardens


Rocks become smaller and smaller and smaller and smaller

Rocks become smaller, and smaller, and smaller, and smaller. . .

  • By erosion

  • By wind

  • By earthquake

  • By floods

  • By rain

  • By slides

  • By man


Terms to know

Terms to Know

  • Weathering: the breaking up of rocks and soil

  • Erosion: the moving of weathered rock and soil. Weathering allows erosion to take place.


Products of weathering

Products of Weathering

  • Clay

  • Sand

  • Rock Fragments (pebbles and stones)


Rocks change

Rocks change…………..

  • By earthquakes

  • By volcanoes

  • By heat and pressure


Sedimentary rock is

Sedimentary Rock is . . .

  • Rock formed when layers of small particles of shell, rock, and sand join together.


Sedimentary rocks how they are made

Sedimentary RocksHow They are Made

  • Wind and water break down the earth

  • Bits of earth settle in lakes and rivers

  • Layers are formed and build up

  • Pressure and time turn the layers to rock


Types of sedimentary rocks

Sandstone

Limestone

Gypsum

Conglomerate

Shale

Types of Sedimentary Rocks


Fossils

Fossils

  • Fossils are usually found in sedimentary rock and are the remains or imprints of plants and animals that died long ago.


Fossils life from the past

Fossils-Life From the Past

  • Fossils provide information about life and conditions of the past.

  • Scientific evidence shows that the Earth is approximately 4.5 billion years old


Metamorphic rock is

Metamorphic Rock is . . .

  • Rock that is formed when pressure and heat create changes to sedimentary or igneous rock.


Metamorphic rocks what are they

Metamorphic RocksWhat are They?

  • Rocks that have changed

  • They were once igneous or sedimentary

  • Pressure and heat changed the rocks


Types of metamorphic rocks

Schist

Gneiss

Types of Metamorphic Rocks


Igneous rock is

Igneous Rock is . . .

  • Rock that is formed when melted rock cools and hardens.


Igneous rocks what are they

Igneous RocksWhat are They?

  • Fire Rocks

  • Formed underground by trapped, cooled magma

  • Formed above ground when volcanoes erupt and magma cools


Types of igneous rocks

Scoria

Granite

Pumice

Obsidian

Types of Igneous Rocks


Review of the rock cycle

Review of the Rock Cycle

  • How are sedimentary rocks formed?

  • What is a fossil?

  • How are metamorphic rocks formed?

  • How are igneous rocks formed?

  • Give an example of each type of rock.

  • What is weathering?

  • Explain what erosion is.


Credits

Credits

  • These slides were a compilation of work by:

  • Jefferson County Schools Power Points on Rocks

  • http://jc-schools.net/PPTs-science.html

  • Ellen Benegar (Suffolk Public Schools)


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