how rocks form - ms. mitchell 7 gold science

How Rocks Form 2-Igneous Rocks

3-Sedimentary Rocks

5-Metamorphic Rocks

6-The rock cycle

Inside Earth text Chapter 5 Sections:

Formed when magma or lava hardens

Basalt Granite

Intrusive Extrusive

Inside Earth Outside Earth

example: granite example: basalt

2. Sedimentary - (examples:

sandstone, limestone, conglomerate,

breccia)

Sandstone

Limestone

Conglomerate

Breccia

Sedimentary Rocks Form in Four Steps

1.Erosion -water/wind/ice loosens and

carries away sediment (pieces

of other rocks or remains of

plants and animals

2.Deposition sediment settles out of the

water/wind/ice carrying it

(it is deposited)

3.Compaction -layers of sediment build up

-layers on the bottom get pressed

together (compacted)

-some of the minerals in the sediment

dissolve in the water around the

sediment

4.Cementation -the dissolved minerals

between the pieces of sediment

harden, gluing (or cementing)

the sediment together

Sedimentary Rock Formation Sedimentary rocks form through the deposition, compaction, and

cementation of sediments. A. Water or wind deposits sediment. B. The heavy sediments press

down on the layers beneath. C. Dissolved minerals flow between the particles and cement them

together.

Relating Cause and Effect What conditions are necessary for sedimentary rock to form?

Formed when igneous, sedimentary, or other metamorphic rocks

are changed due to extreme heat and/or pressure (usually deep

underground)

Schist

Slate

Marble

Gneiss

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Now answer Cornell Notes left side questions and write a 1-3 sentence summary.