Plate Tectonics From Hypothesis to Theory Plate tectonics is a scientific theory that explains two centuries of often puzzling observations and hypotheses a bout our planet Earth. a The continents are drifting very slowl across the face of our planet Continental drift is a concept with a long history

Introduction: What Is an Igneous rock? Igneous rocks vary greatly. Some contain large mineral grains. Others contain grains so small they can barely be seen under a high power microscope. Igneous rocks also vary greatly in color. All igneous rocks are formed through the cooling and solidification of magma

Introduction: Weathering The Breakdown of Rock At the Earth's surface, rocks are exposed to the effects of weathering: the chemical alteration and mechanical breakdown of rock, when exposed to air, moisture, and organic matter. Weathering is an integral part of the rock cycle. Weathering converts rock to regolith

What is Metamorphism?1) Metamorphism is the change in form that happens in Earths crustal rocks in response to changes in temperature and pressure

当光波从一种介质传到另 种介质时,其传播速度和方 向会发生改变这种现象叫折 射。光在入射介质中的传播 速度与折射介质中的传播速 度之比,等于入射角正弦与 折射角正弦之比

金绿宝石(Chrysoberyl) 1、主要特征 成分:BeAl2O4 晶系:斜方,二轴晶,正光性(+)

5-1水资源 一、天然水资源 1.地球上水的总量——14亿KM3

1、土地统计分析的基本方法 2、我国现行土地统计制度

一、了解地籍管理信息系统的概念、现状与发展趋势。 二、熟悉地籍管理信息系统的主要功能。 三、掌握地籍管理信息系统各个子系统的组成和应用。 四、重点掌握地籍管理信息系统的建库、查询与输出方法

一、土地利用动态监测概述 自然环境的演变:如全球变暖、海平面上升、植被演替、自然灾害(荒漠化、崩滑流等)等造成土地资源质量下降和数量减少