Presentation on theme: "Exploring Earth’s Surface Mrs. R. Williams. Topography Topography is the shape of the land. An area’s topography may be flat, sloping, hilly, or mountainous."— Presentation transcript:
Topography Topography is the shape of the land. An area’s topography may be flat, sloping, hilly, or mountainous. The topography of an area includes the area’s elevation, relief, and landforms. A topographic map is a map showing the surface features of an area.
Elevation The height above sea level of a point on Earth’s surface is its elevation.
Relief The difference in elevation between the highest and lowest parts of an area is its relief. Example: The difference between these two points would be the relief of this area
Landforms A landform is a feature of topography, such as a hill or valley, formed by the processes that shape Earth’s surfaces. Different landforms have different combinations of elevation and relief.
Types of Landforms Landforms vary greatly in size and shape-from level plains to high mountain peaks. We will be learning about three main types of land forms: mountains, plains, and plateaus.
Mountains A mountain is a landform with high elevation and high relief. They usually occur as part of a mountain range. A mountain range is a group of mountains that are closely related in shape, structure, and age. Mount Everest K2 (Mount Godwin Austen) Mount McKinley
Plains A plain is a landform made up of nearly flat or gently rolling land with low relief. A plain that lies along a seacoast is called a coastal plain. A plain that lies away from the coast is called an interior plain. Upper Coastal Plain of Georgia North DakotaLower Coastal Plain of Georgia
Plateaus A landform that has high elevation and a more or less level surface is called a plateau. A plateau is rarely perfectly smooth on top. Streams and rivers may cut into the plateau’s surface. Colorado Plateau Columbia Plateau in Washington Balochistan Plateau of Pakistan
Landform Regions A large area of land where the topography is made up mainly of one type of landform is called landform region.
Models of Earth Maps and globes show the shape, size, and position of Earth’s surface features. A map is a flat model of all or part of Earth’s surface as seen from above. A globe is a sphere that represents Earth’s entire surface. A political map shows boundaries. Maps and Globes
A map’s scale relates distance on a map to a distance on Earth’s surface. Scale is often given as a ratio. Mapmakers use shapes and pictures called symbols to stand for features on Earth’s surface. A map’s key, or legend, is a list of all the symbols used on the map with an explanation of their meaning.
To find a point on Earth’s surface, you need a grid. A grid uses lines to make rows and columns on a map. The rows go from side to side and the columns go up and down. Most maps and globes show a grid. Earth’s Grid To locate positions on Earth’s surface, scientist use units called degrees. A degree (°) is 1/360 of the distance around a circle.
Halfway between the North and South poles, the equator forms and imaginary line that circles the Earth. The equator divides the Earth in the Northern and Southern Hemispheres. A hemisphere is one half of the sphere that makes up Earth’s surface. Earth’s Grid The Prime Meridian makes a half circle from the North Pole to the South Pole. It passes through Greenwich, England. Places to the east of the Prime Meridian are in the Eastern Hemisphere and places to the west are in the Western Hemisphere.
By using the equator and prime meridian, mapmakers have constructed a grid made up of lines of latitude and longitude. The line of latitude and longitude on a map form a grid that can be used to find locations anywhere on Earth. Locating Points on Earth’s Surface The equator is 0° (degrees), and is the starting place for measuring latitude, the distance north or south of the equator. The Prime Meridian is 0° (degrees) and is the starting place of measuring longitude, the distance east or west of this. Example: A city on this line is said to be located at 40° S. Example: A city on this line is said to be located at 20° E.
Now…I have some bad news and some good news for you!!! PSST after your results from last week, I don’t think this news is that bad!
Bad news….there is a test on Friday Good news….it will be an open-note and/or open- book test!!