Continuing on our new unit

Today we took a final look at the population clock, finding out how much the American population would raise in 50 minutes and how much the world population would raise in 50 minutes. At the end of 50 minutes, the American population raised by about 200 people and the world population raised by 7,000 thousand people. We also took a look at life expectancy. Life expectancy is the average number of years to be lived by a group of people born in the same year. We learned that the life expectancy was determined by the standard of life, and health accommodations. We learned men usually lived less than women lived. This is due to military activity, women go to the doctor more often, guys are more reckless, and finally, men tend to have more dangerous jobs than woman do. We also defined potable water. Potable water is water safe for human consumption. We talked about crude birth and death rate, which is the births and deaths per 1000 people. The rate of natural increase (RTI), is produced by subtracting death rate form birth rate. This gives us the annual natural growth, in percentage form.