Which factor is not important to the generation of magnetic current in Earth's core?

A. electrical conductivity of iron
B. rotation of Earth
C. motion caused by convection
D. great heat in the core


Answer: D. great heat in the core

Environmental & Atmospheric Sciences

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Biomes are distinct regions separated from one another by drastic climate and vegetative differences.

Answer the following statement true (T) or false (F)

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This prevents wind from following the direction of the horizontal pressure gradient force:

A) friction with the ground. B) the earth's magnetic field. C) interaction with the solar wind. D) the Coriolis effect.

Environmental & Atmospheric Sciences

The 2005 Atlantic hurricane season set records for

A) number of named storms B) number of hurricanes C) number of major hurricanes D) worst natural disaster in U.S. history E) all of the above

Environmental & Atmospheric Sciences

How does natural selection operate Select all

a. natural selection changes the allele frequencies of an individual b. individuals with adaptations to their environment pass on their genes to more offspring c. organisms acquire new physical traits to survive in an environment, then they pass these on to offspring so that they can survive d. natural selection acts on genetic variation of organisms in a population e. natural selection produces differences in traits, and these traits can either increase or decrease survival and reproduction

Environmental & Atmospheric Sciences