What causes Earth to have a magnetic field?
What will be an ideal response?
The motion of molten iron in the outer core produces an electrical current and this current generates a magnetic field.
You might also like to view...
The ____ has/have a low ratio of volume in comparison to its area in the ocean
a. Continental shelves b. Submarine canyons c. Continental rises d. Deep ocean floor
Companies incorporated in an offshore center tend to have tax-free status regardless of the nationality of the owners
Indicate whether the statement is true or false.
Precipitation that falls directly to the ground is known as
A) throughfall. B) overland flow. C) infiltration. D) stem flow.
?Match the term with the correct description.
A. ?the concentration of this gas increased from 318 ppm to 400 ppm between 1960 and 2015, primarily due to fossil fuel use B. ?greenhouse gas emitted by human activities including livestock production, rice production, natural gas production, landfills, and the flooding of land behind large dams C. ?potent greenhouse gas that has increased in the atmosphere primarily due to the increased use of fertilizers D. ?this gas amplifies the warming effect of other greenhouse gases E. ?suspended microscopic droplets and solid particles in the atmosphere