What process accounts for the layers found in Earth?
a. Plate tectonics
b. Accretion
c. Density stratification
d. Subduction
ANS: C
Heavy elements like iron and nickel pulled inward towards the core while lighter materials like oxygen
and silicon rose toward the surface. The Earth now has distinct interior layers separated by their
density. Information can be found in the section Earth, Ocean, and Atmosphere Accumulated in Layers
Sorted by Density.
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How did the debris from the Gros Ventre Landslide of 1925 lead to another disaster in the same region in 1927?
A) Loose debris resulted in a mudflow. B) The mass movement of sediment contaminated drinking water. C) The debris blocked the river, creating a lake that later burst. D) The debris mixed with river water to create a lahar.
the collection of genes in an interbreeding population that includes each gene at a certain frequency in relation to its alleles
What will be an ideal response?
Weathering is an integral step in the formation of soil
Indicate whether the statement is true or false.
Processing of computer information is an example of which sector of the economy?
A) sixth percentile B) primary and secondary C) primary D) tertiary E) the data sector