The Earth exhibits a magnetic field that reaches above our atmosphere. Earth has a solid inner core and surrounding this is the outer
core, a 2,000 km thick inner core that is fluid. Differences in temperature, pressure and composition within the outer core cause
convection currents in the liquid as cool, dense matter sinks whilst warm, less dense matter rises. The Coriolis force, resulting from
the Earth's spin, also causes swirling whirlpools. This movement of ions generates electric currents, which in tur produce magnetic
fields. Because of this we know that the outer core must be composed of
A)
plasma
B)
iron and nickel
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nickel and lead
D)
lead and mercury
Answers: 2
Geography, 22.06.2019 19:00
An earthquake’s epicenter can be determined from arrival time data recorded on a(
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Which of the following terms describes the layers of air surrounding the earth ?
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In which direction does the moving force of air flow? a-from warm temperatures to cold temperatures b-to areas of high pressure to areas of low pressure c-east to west d-from high elevations to low elevations
Answers: 1
Geography, 23.06.2019 23:00
Zac wanted to determine the measure of r and of ? r in the triangle below. to fine the measure of r, zac sets up the problem.42^2 + 24^2 = r 2. determine whether zac set the problem up correctly.
Answers: 3
The Earth exhibits a magnetic field that reaches above our atmosphere. Earth has a solid inner core...
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