Water currents along the coastline of chile pull up deep water that is
a. warm and high in nutrients
b. cold and high in nutrients
c. cold and low in nutrients
d. warm and low in nutrients

Which of the following describes what rocks usually are composed of ,

Which factors add to the greenhouse effect and are caused by human activities?

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle