Greatest Discoveries/Bill Nye/Earth Science 19:48 min

Faces of Earth: Shaping the Planet 45 min

Weathering and Erosion Crash Course 4:05

Weathering & Erosion

Discovery Learning videos: vickilowery pw:gogreen

Basics of Geology: Erosion and Weathering grades 6-8 20 min
Paul the Penguin:Weathering & Erosion grades K-2;3-5 21 min


The process that breaks down rock and other substances on the Earth's surface. Heat, cold, water, ice, oxygen, and carbon dioxide all contribute to weathering.

Mechanical weathering - when rock is physically broken down into smaller rocks. Causes include: freezing & thawing, release of pressure, plant growth, action of animals, and abrasion.

Chemical weathering - the breakdown of rock through chemical changes. Causes include: the action of water, oxygen, carbon dioxide, living organisms & acid rain.

Rate of weathering - Two most important factors include type of rock & climate

The removal of rack particles by wind, water, ice, or gravity.

Surface Features using maps

Topography - the shape of the land including the area's elevation, relief, and landforms
Elevation - the height above sea level on the Earth's surface
Relief - the difference in elevation between the highest and lowest parts of an area
Landforms - a feature of topography, such as a hill or valley, formed by the processes that shape the Earth's surface.

Three main types of landforms

Plains - nearly flat (low elevation) of gently rolling land with low relief
Mountains - landforms with high elevation and high relief
Plateaus - landforms with high elevation and a more or less level surface (low relief)

Topographic Maps

How are landforms represented on flat maps?

How to read Contour Maps

Matching Contour maps

Mapping Topics

How to read Topographic Maps

Topozone - How to Read a Topographic Map

Contour Line Basics

Earth's Foldable Landform Flip Book