first test geography good luck study hard! Flashcards
what are contour lines
2 points
contour lines are lines that join points of equal heights above sea level.
each line represents a certain height above sea level (50m,100m)
contour lines are used to display topography (ex: hills valleys,rivers,etc)
3 things to remeber about contour lines
a) 2 contour lines that are running side by side represent a slope
b) the closer contour lines are the steeper the slope
c) contour lines that join and create shapes such as circles or ovals represent mountains or hills
what happens when contour lines run across a stream
they point towards the source of the stream
what is a contour interval?
a contour interval is a vertical difference that exists between two different contour lines.
(ex. the difference in height between 2 contour lines of 25 meters and 50 meters is 25 meters therefore the contour interval is 25.)
to calculate the slope we use the formula?
rise/run
what are lines of latitude?
parallels of latitude are concentric circles that get smaller/diminish in diameter(size) from the equator to the north/south poles. there are also used to determine the locations north or south of the equator.
what are lines of latitude and lines of longitude are called?
merdians and parallels
what are lines of longitude
they are called meridians and they pass through north and south poles crossing all parallels(lines) of latitude at right angles.(the prime meridian runs through Greenwich)
what does longitude measure
the distance from the prime merdian east or west
Why do we have seasons?
The earth rotates on its axis of a 23.5 tilt,
the earth revolves around the sun with the tilt remaining stationary.
what are the 3 questions geographers ask
where is it located?
why was it located there?
what are the consequences of it being in this location?
NImby + notinmybackyard
5 THEMES OF GEOGRAPHY(IMPORTANT)
location- is a place defined by its longitude and latitude
the two types of locations
a) relative location- a place connected or related to a place
b)Absolute location is a very accurate location defined by longitude and latitude
place
- geographers look at the characteristics that distinguish one place from another.(landforms, climate, language, etc)
human/Environmental interaction
-geographers study the way humans interact positivity and negativity with the environment, they also study the lasting effects of the interactions
-movement
transportation how and why people travel from one place to another
this also includes food transportation and oil,etc
-regions
a region is a unit on the earth’s surface that has unifying characters such as climate or industry.
how do gps work?(global positioning system)
IMPORTANT NOTE( you need at least 3 satellites for a GPS to be accurate and work) GPS satellites circle the earth twice a day in a precise orbit. Each satellite transmits a unique signal and orbital parameters that allow GPS devices to find the precise location of the satellite, GPS use this info and trilateration to calculate a users exact location.
three types of scales
direct statment
-one cm represents one km
representative fraction
no units of measurement
1:50000
scale line
a scale that represents the measure of distances
why do countour lines point towards the source of stream
V-shaped contour lines point upstream when they cross a river. Downward erosion decreases the elevation of the land, and that loss in elevation is reflected in the contour lines.
