Which of the following best specifies the purpose of error bars on a graph? O to show the mean of a data set

O to identify the independent variable

O to give a visual display of measurement precision

O to indicate the total number of measurements that are made

1. emigration the movement of people from one place to another 2. immigration a situation in which resources are being used up at a faster rate than they can be replenished 3. migration the leaving of one's homeland to settle in a new place 4. overpopulation the movement of people to a new country 5. sustainable development a situation in which the birth rate is not sufficient to replace the existing population 6. underpopulation the ability to meet current needs without reducing the ability to meet future needs 7. unsustainable development the increase in the population of a city 8. urbanization a situation in which the number of people exceeds the available natural resources in an area

One of the reasons that stars are so large is because

What materials must dams have to produce electricity, and what must occur?