Geog 155 Exam 1
what are the four spheres of earth?
1. atmosphere
2. biosphere
3. hydrosphere
4. lithosphere
what is the atmosphere?
several layers that envelop earth (sky)
what is the biosphere?
living things and why they live where they do
what is the hydrosphere?
everything having to do with water
what is the lithosphere?
geological processes (rocks)
what is the geographic grid?
north pole - 90ºN
arctic circle - 66.5ºN
tropic of cancer - 23.5ºN
equator - 0º
tropic of capricorn - 23.5ºS
antarctic circle - 66.5ºS
south pole - 90ºS
what does a large scale map mean?
large amount of detail; can only show a small area
, what does a small scale map mean?
small amount of detail; can show a large area
what is a map?
a symbolic depiction emphasizing relationships between elements of some
space, such as objects, regions, or themes
- a flat representation of Earth, shown reduced in size with only selected features
or data showing
what is a globe?
a spherical model of earth
- a true representation of earth
what is the inclination of earth's axis?
earth is tilted at about 23.5º perpendicular to the plane of the ecliptic
- due to this tilt, the sun shines on different latitudes at different angles
throughout the year
what is perihelion?
earth is closest to the sun (91.4 million miles) around January 3rd
what is aphelion?
earth is farthest from the sun (94.5 million miles) around July 4th
which direction does the earth rotate?
west to east at ~1000 mph
how long does it take to make a full rotation of the earth?
what are the four spheres of earth?
1. atmosphere
2. biosphere
3. hydrosphere
4. lithosphere
what is the atmosphere?
several layers that envelop earth (sky)
what is the biosphere?
living things and why they live where they do
what is the hydrosphere?
everything having to do with water
what is the lithosphere?
geological processes (rocks)
what is the geographic grid?
north pole - 90ºN
arctic circle - 66.5ºN
tropic of cancer - 23.5ºN
equator - 0º
tropic of capricorn - 23.5ºS
antarctic circle - 66.5ºS
south pole - 90ºS
what does a large scale map mean?
large amount of detail; can only show a small area
, what does a small scale map mean?
small amount of detail; can show a large area
what is a map?
a symbolic depiction emphasizing relationships between elements of some
space, such as objects, regions, or themes
- a flat representation of Earth, shown reduced in size with only selected features
or data showing
what is a globe?
a spherical model of earth
- a true representation of earth
what is the inclination of earth's axis?
earth is tilted at about 23.5º perpendicular to the plane of the ecliptic
- due to this tilt, the sun shines on different latitudes at different angles
throughout the year
what is perihelion?
earth is closest to the sun (91.4 million miles) around January 3rd
what is aphelion?
earth is farthest from the sun (94.5 million miles) around July 4th
which direction does the earth rotate?
west to east at ~1000 mph
how long does it take to make a full rotation of the earth?
