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

10 points per question and brainlist 1. name four of the ruling dynasties of china. describe at least three contributions to society from each dynasty. 2. why did the qin ruler zheng burn chinese literature and philosophy books? how did the han dynasty establish a strong and effective government? why did people rebel against the sui rule? 3. what new technologies were invented during the tang dynasty and fully developed in the song dynasty that would eventually have a great impact on the world? explain why this technology had such an impact. 4. who were the invaders that seized control and took over the song dynasty? 5. how was china's history affected by its policies of isolation from the outside world during the ming dynasty?