During the age of exploration, there were no major risks associated with exploration.
true
false

Ais a survey that focuses on only a small portion of the population, and the results are generalized for the larger population.

Explain: plate tectonics and people.

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