Geography dictionary

Here there is some of the vocabulary we learnt these days our geography class:
Geographycal Dictionary

Unit 1:
Mountain range: its a group of mountains normally located in a line
Valley: a lower area between to mountains
Hill:a landform a bit smaller than a mountain
Archipelago: a group of islands
Flood: when territories are invaded by the water
Earthquake: a sudden movement of the ground caused by movements within the earth´s crust
Streams: small rivers, they move a little amount of water
Highways: types road made by humans to travel quickly by car.
Geography: is the science that studies lanscapes, people,places and environment in eatrh 
Crop: the product of a plant or the plant it´s shelf that is produced while growing.
Harvest: time when the products that plants give are picked up

Unit 2:
Edge: outsider limits of and object, area or surface
Collide: when two objects crash at each other
Mouth of a river: is the part of a river that edges with the sea and the salty water and fresh  water mixes.
Flood:When the amount of water is too big and the river can´t manage that and the water goes out of it invading everything
Boundarie lines: imaginary lines that marks the limits between two countries.
stream or creek: body that is not considered a river because it has very low water
Bassin: area of land containing a river that is lower than the sourronding area
livestosck: animals that live in a farm
buttes: small hill

Unit 3:
Birth rate:number of births per 1000 people alive in a year in a population.
Death rate: Number of deaths per 1000 people alive in a year in a population
General fertility rate: number of births per 1000 women aged 15-49 in a year in a population
Infant mortality rate: number of deaths infants per 1000 children born
Life expectancy: is the average of years that one person may spect to live.
Natural increase: is the number of births minus the number of deaths.
Family planning: Is the number of childrenthat a family expects to have.
MEDC: more echonomicaly developed countrie. Rich countries
LEDC: less echonomically developed countrie. Poor countries or countries in way of development
Overpopulation: when the population is bigger than the capacity of a countrie
Underpopulation: when the population is extreamly lower than the amount of people that is advisable to have
aeging population:when the adult and the elderly population increases.
Dependent population: Population that have retired from their work and now relies o  the population in the laboral force to satisfy their necesities and services.
Population density: number of people that live in a particular place