Directions: Match the definitions with the correct vocabulary term. Column A __ Mostly solid layer of Earth. Highly viscous. 2 __ Underwater mountain chain that encircles the globe. 3. __ Outer-most layer of Earth, 4. __ Exist at the mid -ocean ridges where slabs of oceanic crust are separating and creating cracks. __ Downward movement of a plate into the mantle. __ Deen denressions in the Column B a. Mantle b. Rift c. Crust d. Mid-ocean ridge e. Trench Subduction

## Step 1<br />The first step is to match the definitions in Column A with the corresponding terms in Column B.<br /><br />## Step 2<br />The first definition in Column A describes a layer of Earth that is mostly solid and highly viscous. This matches the definition of the 'Mantle', which is the layer of Earth that is mostly solid and highly viscous.<br /><br />## Step 3<br />The second definition in Column A describes an underwater mountain chain that encircles the globe. This matches the definition of 'Mid-ocean ridge', which is an underwater mountain chain that encircles the globe.<br /><br />## Step 4<br />The third definition in Column A describes the outermost layer of Earth. This matches the definition of 'Crust', the outermost layer of Earth.<br /><br />## Step 5<br />The fourth definition in Column A describes something that exists at the mid-ocean ridges where slabs of oceanic crust are separating and creating cracks. This matches the definition of 'Rift', which is a crack or split in the Earth's crust where slabs of oceanic crust are separating.<br /><br />## Step 6<br />The fifth definition in Column A describes the downward movement of a plate into the mantle. This matches the definition of 'Subduction', which is the process of a plate moving downward into the mantle.<br /><br />## Step 7<br />The sixth definition in Column A describes deep depressions in the Earth's crust. This matches the definition of 'Trench', which is a deep depression in the Earth's crust.