tailieunhanh - Geology

Geology geology is the study of the earth, the processes that formed it and how it will continue to change in the future. Earth is approximately billion years old. Rocks are always in a process of changing. Heat, pressure, weathering and erosion cause the changes and are referred to as the rock cycle. There are three types of rock; igneous (volcanic), metamorphic (changed) and sedimentary (layered). Igneous rocks are formed from lava that has cooled. Metamorphic rocks are changed by heat and pressure. Many are stacked with. | 4 Table of Contents Copyright Table of Geology Introduction - Activity - Rock Practical Life Area Activity - Tonging Sensorial Area Activity - Visual Language Area Activity - Make-up Stories About Mathematics Area Activity - Creating Sets Using Art Area Activity - Needs of Man - Aesthetics Activity - Group Rock Observation - Hardness Scale Activity - The Scratch Ability Observation - Physical Properties Activity - Minerals Activity - Grinding Rock Gems Activity - Gemstones of the Ore Activity - What is a Copper 5 Igneous Rock Activity - Volcano Sedimentary Rock Activity - Millions of Rocks in Your Activity - Silly Man Metamorphic Rock Activity - The Practice of Hand Fossils Activity - Miniature Fossil Dig .46 Layers of the Earth Activity - Physical 6 General Introduction - Geology Geology is the study of the Earth the processes that formed it and how it will continue to change in the future. Earth is approximately billion years old. Rocks are always in a process of changing. Heat pressure weathering and erosion cause the changes and are referred to as the rock cycle. There are three types of rock Igneous Volcanic Metamorphic Changed and Sedimentary Layered . Igneous Rocks are formed from lava that has cooled. Metamorphic Rocks are changed by heat and pressure. Many are stacked with mineral grains running through them. Sedimentary Rock is formed from mud or sand and has settled at the bottom of water at some point. This rock may contain fossils. You can see wavy horizontal lines and layers. A fossil has the same shape as the original life form. Diamond is the hardest natural substance found on Earth. Quartz is one of the most common minerals found on Earth. Basalt is the most common rock on Earth. Feldspars make up more than 50 of the Earth s