The Pacific and North American Plates.
The California Department of Motor Vehicles is the only legal place to obtain private plates for your vehicle. You can order the plates online, through the mail or from one of their field offices. They have over two dozen offices all over the state of California.
Two
yes
In fact there are three of them: The Pacific, North American and Cocos plates.
I'm pretty sure number plates are displayed on both the front and rear in California, so two.
Pacific and North American Plate
The San-Andreas fault line.
it doesnt
Magma seeps up through the two plates from the mantle and form volcanos.
The Southern part of California is on the Pacific plate and the Northern part of California is on the North American plate.
Yes, you can drive in Canada with California plates. Our international agreements allow our two countries to cross the each others border in their POV. Though personally I have only driven in Canada with Florida plates and Washington State plates. It's your proof of Citizenship and reason for visiting Canada I would be more worried about.
Converging (destructive) plate boundary: where two plates collide. Diverging (constructive) plate boundary: where two plates move away from each other. Transform plate boundary: where two plates move, or grind, past each other. Like the boundary in California.