What causes the earth’s magnetic field?
circulation of van allen belts around the planet

presence of charged particles in the inner core

movement of charged particles in the outer core

charged particles from solar wind hitting the magnetosphere

How does friction with the atmosphere affect the speed of an artificial satellite

The response is the basis for vaccination. primary secondary tertiary none of the above

The greenhouse effect a. something that has occurred for millions of years b. an unnatural phenomenon caused by humans that maintains earths temperature range. c. the results of the differences in the angle of the suns rays d. an unnatural phenomenon that causes heat energy to be radiated back into the atmosphere