G 1-2

Models of Earth

EQ: How do maps and globes represent the Earth?

G 1-2

Maps and Globes

• Map –flat model of all or part of Earth’s surface as seen from above

• Globe – a sphere that represent Earth’s entire surface– Correctly shows the relative size and shape of

landmasses and bodies of water– Both are drawn to scale and use symbols to

represent topography and other features

EQ: How do maps and globes represent the Earth?

G 1-2

Parts of the Map

Scale – relates distance on a map to a distance on the Earth’s surface. Often given as a ratio

Symbols – pictures that represent featuresKey – legend, a list of symbols used on the mapCompass Rose – used for direction on a map.

The top of a map is usually North

EQ: How do maps and globes represent the Earth?

G 1-2

Earth’s Reference System

Equator – imaginary line divides the Earth into Northern and Southern hemispheres.

Hemispheres= ½ of the sphere that is planet Earth.

Prime Meridian – imaginary line that makes a half circle from the North Pole and the South Pole. It divides the earth into the Western and Eastern hemispheres

Degree – 1/360 of the way around a full circle.EQ: How do maps and globes represent the Earth?

G 1-2

Locating Points on the Earth’s

Surface

Latitude – distance north or south of the equator. The equator is 0 °. North Pole is 90 °north, South Pole is 90 ° south.

Longitude – distance in degrees east or west of the Prime Meridian. Prime meridian is 0°. Half way around the sphere is 180° east or west.

EQ: How do maps and globes represent the Earth?

G 1-2

Map Projections- A framework of lines that show land masses on a flat surface

Mercator projection lines are flat and straight. Land masses are distorted.

EQ: How do maps and globes represent the Earth?

Equal Area projection: correctly shows the sizes of Earth’s landmasses. Landmasses at the edges are distorted.

G 1-2

Class work and Homework

Fill InWhat did I learnConfusedSay

Inquiry, “A Borderline Case”, page G25,,G168-169.

EQ: How do maps and globes represent the

Earth?