A Response Options Calculator (ROC) can be used when responding to an oil spill to help predict how the oil will change over time and determine which methods can be best
used to clean it. What is the benefit of this type of tool?
It allows the oil company to determine the amount of their losses.
Olt measures the weather conditions to let responders know if they can start cleaning.
It helps save time and money by finding the most effective clean up methods.
It assesses how many people will be needed to completely clean up the entire spill.

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

Anton created a chart listing different types of materials. which best complete the chart?

The two tubes contain bromothymol blue. after 24 hours, what will the color of the water be in tube b? a. green (it won't change) b. yellow c. blue d. colorless (clear)