Can you explain the different plate margins?

(NB:this is not a full answer, those taking GCSE or A-Level examinations would need more detail)

Plate margins are the places where the Earth's plates meet and sometimes they are known instead as plate boundaries. The reason for the movement of these plates is due to the movement of the mantle underneath them. At the centre of the Earth is a ball of solid iron and nickel called the core which has a temperature of roughly 6,000 degrees celsius, and surrounding this is the mantle, which is a semi-molten layer. The magma in the mantle gets heated by the high temperatures in the core, which causes it to move. The movement of the magma drags the plates with it, hence causing them to move around the Earth's surface, which is how plate margins are formed. There are three types of plate margins. The first being destructive, where two plates are moving towards each other. The type of impact this has upon the land depends on the type of plates that collided. The second type of plate margin is known as constructive, and this is where two plates move away from each other. In this case, magma rises from the mantle to fill the gap that has been made and could, leaving behind a new crust. Lastly, there is conservative margins. This is where two plates are moving sideways past one another, or in the same direction but at different speeds. In this case, crust is neither created nor destroyed.