Aim: How do we compare the spheres of the Earth?

Do Now: Earth’s Sphere’s Worksheet

How do we describe the lithosphere?

Lithosphere

Solid Layer

Most dense

Composed of Rock and Soil

Oxygen and Silicon – 2 most abundant elements

Thickness from 72 to 153 kilometers

Has other elements – aluminum, iron, calcium,

sodium

Solid rock material under ocean

sediments

Continuous bedrock shell around the earth

Known as the Crust

How do we describe the hydrosphere?

Hydrosphere

Liquid Layer

Oceans, lakes, rivers, streams, & groundwater

Oceans average depth of 3-5 km

Cover’s 70% of Earth’s surface

Less dense than the lithosphere

Earth’s thinnest layer

Water composed of 33% oxygen and 66%

hydrogen

99% salt water & 1% fresh water

How do we describe the Atmosphere?

Atmosphere (Troposphere)

Gas Layer

Least dense of all the spheres

Consists of 4 layers – troposphere, stratosphere,

mesosphere, and thermosphere

We live in the troposphere layer (lowest layer)

Troposphere - only layer that contains water vapor and weather

conditions

Air mixture consists of 78% Nitrogen and 21%

Oxygen

Troposphere- temperature decreases with increasing

altitude

Troposphere contains the most mass of the

atmosphere

High

Density

Low

Litho Hydro Atmosphere

Draw a bar graph to show the relationship between the density of each of sphere