Which of the following choices represents a rate of seafloor spreading commonly associated with a ridge such as the Mid-Atlantic Ridge?
A) 1-5 mm/yr
B) 1-5 cm/yr
C) 1-5 m/yr
D) 1-5 km/yr
Answer: B
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Historical data indicate that the Sahara Desert once had a wetter and milder climate
Indicate whether the statement is true or false
Plants and burrowing organisms contribute to soil development by ________.
A. contributing their waste products, which act as nutrients B. establishing small holes and pathways for water and nutrients to flow C. breaking up solid particles and churning the soil profile D. contributing carbon dioxide and organic acids E. All of the answers are correct.
The creeping movements along some segments of the San Andreas Fault are shown by millimeters per year of offset of sidewalks, fences, buildings, and other features.
Answer the following statement true (T) or false (F)
A map of population density for the European region is perhaps best understood in comparison to proximity to water, as settlements have historically developed around coastal areas and along major rivers, which were primary sources of transportation
Indicate whether the statement is true or false