Match the vocabulary word with its definition. 1. aggregate economic behavior 2. debt 3. default 4. gross domestic product 5. investment 6. needs 7. unemployment rate 8. wants percentage of people in a country willing to work and looking for work but currently unemployed economic wide results of individual behavior goods or services desired by a person but not required for survival purchase of goods used to create more wealth the monetary value of all finished goods and services in a country failure to fulfill and obligation monetarily money owned or due a good or service required for survival

Which characteristics of temperature and salinity have the greatest influence on the movement of deep-ocean currentsa. warm and low salinityb. cold and high salinityc. cold and low salinityd. warm and high salinity

Scientist: cross-sections of stalactites—calcite formations deposited on cave ceilings by seeping water—can reveal annual variations in rainfall in particular areas over hundreds and thousands of years. we often found that when—according to these cross-sections—drought occurred in a particular area, it coincided with the collapse of an ancient society in that area. i hypothesize that drought reduced agricultural productivity in these areas, thereby leaving these societies without the resources needed to handle internal stresses and external threats. which of the following, if true, would most weaken the support for the scientist's hypothesis? a. many droughts indicated in the cross-sections of stalactites do not correspond with the collapse of a society in that area. b. information from the cross-sections of stalactites alone cannot reveal the level of agricultural output in an area at a particular time. c. most of the societies that collapsed during droughts did so when internal power struggles coincided with military raids from neighboring societies. d. most of the societies that collapsed during droughts maintained large stockpiles of food and water at the time of their collapse. e. information from stalactites also suggests that the collapse of some societies coincided with periods of abnormally high rainfall.

Fossil fuels such as coal, oil, and natural gas were formed over millions of years by