Inside the Earth

Composition (What it is made of) Crust Mantle Core

The Crust Outer layer 5-100 km thick 2 types of crust Oceanic (very dense, made of basalt) Continental (less dense, made of granite)

Oceanic and Continental Crust

The Mantle Middle layer Very thick layer

The Core Made mostly of iron 1/3 of the earth’s mass Very hot

Earth’s Layers How are the earth’s layers similar to an egg? Shell=crust Egg white=mantle Yolk=core

Physical Structure of the Earth (5 Layers) Lithosphere- rigid outer layer (crust) Asthenosphere- solid rock that flows slowly (like hot asphalt) Mesosphere- middle layer Outer Core- liquid layer Inner Core- solid, very dense

Tectonic Plates Earth’s crust is broken into about 19 pieces These plates move on top of the asthenosphere

TYPES OF ROCKS Igneous Sedimentary Metamorphic

IGNEOUS ROCKS Formed from molten material including volcanic lava, ash, or bombs as well as magma below Earth’s surface

TYPES OF IGNEOUS ROCKS BASALT GRANITE

SEDIMENTARY ROCKS Made of layers that have been pressed or cemented together Pebbles, sand, silt, or clay are sediments Shells and bones can also be sediments

TYPES OF SEDIMENTARY ROCKS LIMESTONE SHALE COAL

METAMORPHIC ROCKS Rocks that are changed by intense heat and pressure while inside Earth’s surface Igneous, sedimentary, and even metamorphic rocks can be changed into different metamorphic rocks

TYPES OF METAMORPHIC ROCKS SLATE MARBLE

ROCK CYCLE The rock cycle is a never-ending process of rocks forming, weathering, and changing into other rocks

ROCK CYCLE