2 column rock notes

EARTH MATERIALS CHANGE BACK AND FORTH AMONG THE DIFFERENT TYPES OF ROCKS.The Rock Cycle • Rocks can change to and from the 3 types... Processes that form Sedimenta ry Rock • Weatherin

Minerals & Rock Unit

Notes

Rocks •Are divided into 3

groups based on how they were

Cementation, Melting, and Cooling.

EARTH MATERIALS CHANGE BACK AND FORTH AMONG THE DIFFERENT TYPES OF ROCKS.

The Rock

Cycle

• Rocks can change

to and from the 3 types

(Granite

#11)

Metamor phic

en ta

ti on

Melting, Solidification

Melting, Solidification

Recrystallization

Recrystallizat ion

Weathering, Erosion, Deposition, Compaction,

Cementation

Processes

that form

Sedimenta

ry Rock

• Weathering: the breaking

down of the Earth’s material

by natural processes (Water, Wind, Ice,

Chemicals, etc.) into smaller pieces or sediments

• Erosion: weathered rock and

soil particles are moved from place to place

•Melting: caused by heat

and pressure around the

rock to form magma

Complete the

following:

•Turn in your Rock Cycle

Directed Reading &

Earthquake/Volcano Test

Corrections

•Get the 2 Directed Readings from the table

•Have something to write with

•Clear off your table

Complete the

following:

•Turn in your Rock Cycle

Directed Reading, Comic

Strip & Earthquake/Volcano Test Corrections

•Get the Igneous Rock

Directed Reading from the table

•Get out your Minerals &

cooling, other

cools under the surface

• Form below ground

from magma

• Usually has coarse

crystals (grains) from cooling slowly

• Some have large and

Magma!

Bedrock

But then the

EARTH’S

elements

Will not leave

the ROCK alone!

THEY BREAK UP THE STONE

Sedimentary Rock • Formed from

sediments (rock

fragments, mineral grains, animal and plant remains) that are

pressed or cemented together or when sediments

precipitates out of

a solution.

• Sediments are

moved by wind, water, ice, or

gravity.

• Water or wind

breaks down

(Weathering), moves (Erosion),

and deposits sediment

(Deposition)

• The heavy

sediments press down on the layers beneath

(Cementation)

layers called STRATA.

• Process of

arranging sedimentary rocks into layers is

STRATIFICATION

• Scientist know that

the layers and fossils on top are YOUNGER than the fossils in lower

layers

 LAW OF SUPERPOSITION

Types of

Sediment

ary Rocks

•Clastic: made of broken

pieces of other rocks.

•Organic: remains of

once living plants and animals are deposited in thick layers called

•Rock salt made from

evaporation of sea waters

Bands (CAN) Form

Metamorphic

means

“changed”

“-“shape” in Greek

• Igneous, Sedimentary and other Metamorphic rocks can change

to become Metamorphic rocks

How Metamorphic

Rocks Change

• Pressure from

overlying rock layers

• High heat, but not

enough to melt the rock

• Rocks may be

flattened or bent or atoms may be

exchanged to form new materials

• Think of

metamorphic rocks

as a squished peanut butter and jelly sandwich in your lunch.

• Not layered & no

bands are formed

• Example: Marble

formed from Limestone

Non-Foliated

always changing…

Oldest Rocks

Here !

Youngest

Rocks Here ! Volcano

Roots here!