the study of the earth's surface, climate, continents, countries, peoples, industries, and products.
natural features of the earth's surface
all of the surrounding things, conditions, and influences affecting the growth or development of living things.
global positioning system
Geographic Information System
an object made by someone in the past
the perserved trace, imprint, or remains of a plant or animal
the sun with the celestial bodies that revolve around it in its gravitational field
the (usually elliptical) path described by one celestial body in its revolution about another
the mass of air surrounding the Earth
an imaginery line that runs through the Earth's center connecting the two poles
a single complete turn of the Earth around the sun
a year in which an extra day is added to the calendar
June 21, when the sun is at its northernmost point
December 22, when the sun is at its southernmost point
either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length
the central part of the Earth
the layer of the earth between the crust and the core
molten rock in the earth's crust
the outer layer of the Earth
One of the principal land masses of the earth, usually regarded as including Africa, Antarctica, Asia, Australia, Europe, North America, and South America.
plate tectonics theory
Theory that great slabs or plates of Earth's outer layer float on a hot, semi-molten mantle. All plates are moving slowly and have rafted continents to new positions over time.
shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity
A giant wave caused by an earthquake on the ocean floor
cracks in the earth's crust
The breaking down of rocks and other materials on the Earth's surface.
condition in which the earth's surface is worn away by the action of water and wind
huge sheets of ice
height above or below sea level
large pieces of flat land.
Large area of high flat or gently rolling land
a relatively narrow strip of land (with water on both sides) connecting two larger land areas
land surrounded by water on three sides
a land mass (smaller than a continent) that is surrounded by water
the gently sloping part of a continent that is under water and rings each continent
a V-shaped valley on the ocean floor
a narrow channel of the sea joining two larger bodies of water
a deep and relatively narrow body of water (as in a river or a harbor or a strait linking two larger bodies) that allows the best passage for vessels
a low triangular area where a river divides before entering a larger body of water