Item A shows a Lava source going through the Mantle and Crust, rising above Sea level to surface labeled Hawaii. Item B shows the Mantle beginning level on the left and dipping down on the right; the Crust is level on the left, labeled Great Valley of California, with mountains on the right, labeled Sierra Nevada and Mount Whitney. How is Item A different from Item B? The crust under the ocean in Item A is thicker than the crust under the mountain in Item B. The mantle under the ocean in Item A is thinner than the mantle under the mountain in Item B. The crust in Item A is found partially below sea level as compared to the crust in Item B. The mantle in Item A is located far below a mountain as compared to the mantle in Item B.

Match the following terms and definitions a region in arkansas defined by the arkansas river in the western part of the state answer 1 a thoroughly dissected area with steep valley walls and narrow floors answer 2 a geographical region of a country or state answer 3 the friendly and generous reception and entertainment of guests, visitors, or strangers answer 4 the branch of knowledge concerned with the production, consumption, and transfer of wealth answer 5 statistical data relating to the population and particular groups within it answer 6 a mountain range in west central arkansas and southeastern oklahoma answer 7 travel for pleasure or business; also the theory and practice of touring, the business of attracting, accommodating, and entertaining tourists, and the business of operating tours answer 8 answer all parts of the question.

How do oceanographers measure the salinity of ocean water?

Write a 150word essay describing the effect of people's activities on the environment in the region.