Basic Bio Human Population Day 2

Last class we talked about how BIG the human population is! Do you remember what kind of growth we have? What letter does this growth look like? What are some things that let us grow so big? medicine nutrition sanitation all of the above Let's take a look at the size of the population in Plainfield versus New York City This is how many people Plainfield has in a square mileTHIS is how many people New York City has per square mile Today we are going to talk about how we track our population growth To look at populations we use something called demography.Demography is the study of how populations will change over time!We can guess if the population will grow or shrink using 4 different things:-Birth rates (how many babies are born)-Death rates (how many people die)-Immigration (movement IN)-Emigration (movement OUT) So what causes a population to grow verus shrink? GROWING POPULATION High Birth Rate Immigration SHRINKING POPULATION High Death Rate Emigration Is there anywhere you guys would like to travel? That's it for today you guys good job!