The great rift valley was formed by
a. earthquakes and volcanic eruptions
b. melting ice caps and the glaciation process
c. weathering and erosion
d. runoff from mountain streams

What benefits does this type of farming have?

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

The language and religion of france developed from which people? a. the franks b. the gauls c. the anglo-saxons d. the romans