What physical clues and evidence prove that these landmasses were together 225 million years ago as Pangaea, and why do scientists think the continents are drifting (continent and sea-floor movements)?
What will be an ideal response?
Geologic, fossil, and paleomagnetic evidence.
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Urban geographers are quite interested in all of the following except
A) how the identities of urban areas evolve. B) relationships between urban areas and surrounding territory. C) land-use within urban areas. D) rural and pastoral areas.
The physical structure and organization of cities is termed
A) urbanism. B) urban form. C) urban ecology. D) urban system.
The solid earth is divided into three layers. Which of the following is not one of the layers?
What is the ultimate source for naturally occurring carbon-14?
A) Cosmic ray collisions and neutron capture involving nitrogen B) Dissolution of carbonate rocks C) Decay of unstable parent isotopes to create a stable carbon-14 D) Volcanic eruption and emission of greenhouse gases