Match the following. match the items in the left column to the items in the right column. 1. eccentricity earth's tilt 2. milankovitch cycles water that moves because of its temperature and salt content 3. obliquity movement of earth's imaginary, rotating, polar axis 4. precession predictable variations of earth's orbit and tilt that can affect climate 5. thermohaline circulation the shape of earth's orbit about the sun; can change from a more elliptical to a more circular path and back 6. upwelling when wind allows cold dense water to rise from the bottom of the ocean to the surface