g国空中的地理 7000 5000 Earth in Space and time 3000 2000 1)早期的太阳系 The Early Solar System Billions of years ago, out of a swirling mass of gas and dust, evolved a system of varied planets hurtling around a nuclear-powered star-our solar system. One of these planets, and one only, give rise to complex life forms. Over time, a tremendous diversity of life forms and ecological system pares developed, while the planet too evolved and changed, its interior churning, its landmasses shifting, its surface constantly being reshaped 减飘 Environmental geology
环境地质学 Environmental Geology 2、时空中的地球 Earth in Space and Time 1）早期的太阳系 The Early Solar System Billions of years ago, out of a swirling mass of gas and dust, evolved a system of varied planets hurtling around a nuclear-powered star-our solar system. One of these planets, and one only, give rise to complex life forms. Over time, a tremendous diversity of life forms and ecological system developed, while the planet too evolved and changed, its interior churning搅拌, its landmasses shifting漂移, its surface constantly being reshaped
2回四中的理 Earth in Space and Time 10000 9000 700 5000 )、早期的太阳系 The Early Solar System Billions of years ago, out of a swirling mass of gas and dust, evolved a system of varied planets hurtling around a nuclear-powered star-our solar system. One of these planets, and one only, give rise to complex life forms. Over time, a tremendous diversity of life forms and ecological system developed, while the Iplanet too evolved and changed, its interior churning# 拌,ts| landmasses shifting漂移, its surface constantly being reshaped 环质 Environmental Geology
环境地质学 Environmental Geology 2、时空中的地球 Earth in Space and Time 1）、早期的太阳系 The Early Solar System Billions of years ago, out of a swirling mass of gas and dust, evolved a system of varied planets hurtling around a nuclear-powered star-our solar system. One of these planets, and one only, give rise to complex life forms. Over time, a tremendous diversity of life forms and ecological system developed, while the planet too evolved and changed, its interior churning搅 拌, its landmasses shifting漂移, its surface constantly being reshaped
回中的球 Earth in Space and time 6000 2)九大行星的形成 The planets 3000 The compositions of the planets foffp/ ded Gaon largely on how near they were to the hot The planets pinet formed nearest to the sun contained mainly high temperature materials: metallic iron and a few minerals with very high melting temperatures, with little water or gas. Somewhat farther out, where temperatures were asteroids》 lower, the developing planets incorporated much larger amounts of lower-temperature minerals, including some that contain water locked within their crystal structures I (This development later made it possible for the earth to pons have liquid water at its surface. Still farther from the sun temperatures were so low that nearly all of the materials in the original gas cloud condensed-even materials like methane and ammonia, which are gases at normal earth surface temperatures and pressures Order s-.Fs Environmental Geology
环境地质学 Environmental Geology 2、时空中的地球 Earth in Space and Time 2）九大行星的形成 The planets The compositions of the planets formed depended largely on how near they were to the hot sun. The planets formed nearest to the sun contained mainly hightemperature materials: metallic iron and a few minerals with very high melting temperatures, with little water or gas. Somewhat farther out, where temperatures were lower, the developing planets incorporated much larger amounts of lower-temperature minerals, including some that contain water locked within their crystal structures. (This development later made it possible for the earth to have liquid water at its surface.) Still farther from the sun, temperatures were so low that nearly all of the materials in the original gas cloud condensed－even materials like methane and ammonia, which are gases at normal earth surface temperatures and pressures
5空的图中的您歌 三 arth in Space and Time 3、地球与其它星体的比较 5000 3000 2000 cable 1.1 50 ome Basic Data on the planets Mean distance Equatorial rom sun diameter asteroids! (millions relative Density Planet of km) to Earth (g/cu cm) Mercu 54、 Predominatly enus 108 0.95 Farth 150 1.00 5.5 rocky/metal Mars 0.53 planets 228 3.9 Jupiter l1.19 13 Saturn 1. 427 2,870 4.06 1.2 Neptune 4, 479 388 planets 1.7 Pluto 5,900 0.23 1.l 8910 环质 Environmental Geology
环境地质学 Environmental Geology 2、时空中的地球 Earth in Space and Time 3、地球与其它星体的比较
8的四中的路 Earth in Space and Tim 4)、地球的结构与组成 manic crust→ up to 10 km(6 mi) thick Mantle Continental Crust crust- (not tol up to 40km(25m) Outer core thick 2900-5000km (1800-3100m Base of crust to 2900km(180m) 环质 Environmental Geology
环境地质学 Environmental Geology 2、时空中的地球 Earth in Space and Time 4）、地球的结构与组成