UNIT 1 Flashcards
What are called the longitude lines?
Meridians
What are called the latitude lines?
Parallels
What are the parallels?
The parallels are imaginary lines. The most known is the Equator that divides the Earth into 2 hemispheres: the North Hemisphere and the South Hemisphere.
What are the meridians?
The meridians are imaginary lines. The most known is the Greenwich Meridian that divides the Earth into 2 halfs East and West.
What does numerical scale mean?
The numerical scale is represented as a fraction. The numerator is 1 cm in the map and the denominator are the cms in reality. Example: 1/200 000.
What does the graphic scale mean?
Is a graduated straight line, divided into equal segments, usually 1 cm each. 1 segment in reality is 20km.
What are the geografical coordinates?
Is a system that uses a three-dimensional spherical surface to determine locations on the Earth.
What is a solstice?
A solstice marks the begining of winter and summer. The summer solstice occurs un the 21st of June and the winter solstice occurs the 21st of December.
What is an equinox?
An equinox marks the begining of spring and autumn. It happens when the rays from the sun are perpendicular to the equator. The spring equinox occurs the 21st of March and the autumn equinox occurs the 23rd of September. During the equinox the both day and night last 12hs.
What is revolution?
Revolution is one of the two movements of the Planet Earth it causes:
·The years=365 days and 6h
·Every 4 years=new day. (6 extra hours*4 years) This is called LEAP YEAR.
·Causes the seasons
Name the 5 most known parallels
Equator
Tropic of Cancer
Tropic of Capricorn
Artic Circle
Antartic Circle
What is rotation?
Rotation is one of the two movements of the Planet Earth. It causes:
-Day and night. It last 24h
-Its axis is tilted 23º. This means that in some places now is daytime and in other places is nightime.
