California has been plagued with earthquakes over the centuries; earthquakes that are a severe danger to life and land. earthquakes are prevalent because in california
a) lies directly over the ring of fire.
b) lies on a continental plate that is falling under the oceanic plate it meets.
c) the pacific plate is moving northwest, scraping horizontally past north american plate.
d) the pacific plate and the north american plate are meeting at a convergent plate boundary.

In 2002, the rare earth elements mine in mountain pass, california was closed because

How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.

Which structure is a valid representation of a hydrocarbon molecule?