class notes 10/6/10

• life expectancy is something that tel your a lot about a given country. for example in a country where people that dont live to past 44 life pretty much sucks there.

• birth rate is how many births per 1000 people

• death rate is pretty much the same thing except death rate is deaths per 1000 people

• rni (rate of natural increase) is the birth rate mins the death rate every country has a positive rate 

• 2.1 babies to have the population stay the same 

• the number of immigrants and emigrant going or leaving a country_net migration rate.

•  people migrate because of push and pull factors alot of people that go to a country go to another because they are being persecuted because of your religion.

some countries have pull factors like freedom of religion the united states has freedom of speech. job opportunities

•   population pyramid-  a chart showing the number of males and females of a certain age and any given time.
• baby boom is when WW2   ended  most people waned to make baby's
•   the u.s is the only country to actually drop a nuclear bomb on someone or other human beings 
• Russia put missals in Cuba