Which of the layers of the Earth has the following three characteristics? i. It is a solid outer layer.
ii. It is between 3 and 30 miles thick.
ii. It is separated into plates.
A. the outer core
B. the inner core
C. the mantle
D. the crust

Distance that lewis and clark traveled from st. louis to ft. clatsop near the pacific ocean.

Ozone in the upper atmosphere has been depleted by a. sulfur dioxide. b. chlorofluorocarbons. c. carbon dioxide. d. oxygen.

When geographers describe how two places are related to each other spatially, they are describing a. where the places are located in relation to one another b. what kinds of natural environments are around each place c. how each place is changing over time d. what kinds of cultures are in each place