What is the type of boundary where plates separate is referred to as what?

How many fluid ounces are there in 10 Tablespoons? What occurs twice a year when earths tilt is neither toward nor away from the sun? What planet do most know extrasolar planets least resemble? Which forms inside the crater of a large volcano? Is the universal spirit called upanished? What causes swelling of the optic nerve? How much animals in the universe? If the earth is spinning why aren't the stars blurry? What latitude and longitude gives us the time? Who put forward a theory about black holes? The nuclear membrane begins to reform around chromosomes at each ends of the cell during? How hypothalamus protect body against hypoglycemia? What is a carnivorous plant found in Georgia's swamps? How is a protist microorganism different from a virus microorganism? How do you ensure that you are not treating all individuals the same? What jobs can you get with an associate's degree in Biology? Is it summer all year around countries near the equator? What is the origin of flame colors? What is Black Nishas Aluva pH number? What would be the effect of removing an organism from the food web?

What is the type of boundary where plates separate is referred to as what?