If a layer of sandstone lies on top of a layer of limestone in which a 300-million-year-old fossil is found, and there are no unconformities, the layer of sandstone must be a. older than 300 million years c. about 300 million years old b. younger than 300 million years d. older than 600 million years

The continental divide a divides the united states into east and west b. divides the united states into north and south c. divides the flow of river systems in the united states into east and west d. is a series of rivers and mountains that separates canada from the united states select the best answer from the choices provided.

Dose local topography and sea surface temp contribute to differences in climate between baeious localities

Because its government strictly controls its economy, north korea has a economy. a. command b. mixed c. traditional d. free market