lauren213 lauren213

10-01-2017
Biology

contestada

The oceanic crust is composed mostly of which substance. why?

Respuesta :

jourdonlovesyou jourdonlovesyou

10-01-2017

It is primarily composed of mafic rocks, or sima, which is rich in iron and magnesium. It is thinner than continental crust, or sial, generally less than 10 kilometers thick; however it is denser, having a mean density of about 2.9 grams per cubic centimeteras opposed to continental crust which has a density of about 2.7 grams per cubic centimeter.

Answer Link

thatschoolchick thatschoolchick

10-01-2017

It is composed of several layers, not including the overlying sediment. The topmost layer includes lavas made of basalt.

Answer Link

Otras preguntas

Which geographic area was most seriously affected by the Dust Bowl of the 193os? (1) Atlantic Coastal Plain (3) Great Plains (2) Ohio River valley

Many critics of the electoral college system point out that it (1) penalizes the states with the smallest population (2) encourages the formati

The Proclamation of 1763 was intended to (1) allow American farmers to use the Mississippi River (2) outlaw slavery in the Ohio River valley (3) pr

The policy of assimilating Native American Indians under the Dawes Act (1887) was reversed by 2oth-century legislation that (1) gave Native American I

The Hungarian uprising of 1956, the U-2 incident, and the Cuban missile crisis led to (1) military actions by the Southeast Asia Treaty Organizati

Part A Short-Answer Questions Directions: Analyze the documents and answer the short-answer questions that follow each document in the space provide

What compound is CuI3?

The Minoan culture, located on the island of Crete, __________. 1:was the first urban civilization to develop in Europe 2:created the first written literature o

Gibbons v. Ogden (1824), United States v. E. C. Knight Co. (1895), and Schechter Poultry Corporation v. United States (1935) are all Supreme Court cas

The United States and New York State constitutions establish republican forms of government because each provides for (1) a standing army (2) elected r