7th plate tectonics

the deep central cleft in the crest of the mid-ocean ridge

a continuous mountain range extending through the oceans of the world

large masses of igneous rock formed when magma intrudes and solidifies

the growth of a continent along its edges.

a long, narrow, elongated depression of the deep seafloor.

a general term for all elastic (flexible) waves in the earth

a kind of volcanic igneous rock, usually dark colored, with a high content of iron.

the record of the past orientation and polarity of Earth's magnetic field recorded in rocks

rock formed by volcanic activity

a long crack in a lithospheric plate formed by hot mantle pushing up from below.

a pattern of movement in a fluid caused by heating from below and cooling from above. 

a large continent consisting of all of Earth's continental lithosphere. 

a long narrow belt in which one plate moves below another plate

Earth's most recent supercontinent, which was rifted apart about 200 million years ago.

zone on Earth's surface where two continents have collided and been welded together into one

the mass per unit volume of a material or substance d=m/v

any evidence of past life preserved in sediments or rocks.