Class 181 & Mr. Vives Study ROCKS at Montauk I.S. 223 Principal: Ms. G. Adduci Fall 2005

Rocks of the World By Jose Conde

What are rocks? Rocks are made up of one or more minerals. There are more than 2000 minerals.

How are rocks classified? Igneous Sedimentary Metamorphic

What are Igneous rocks? Igneous rocks are formed by magma. Magma that comes out of the volcano it is called lava. When lava cools it forms igneous rocks.

What are sedimentary rocks? Any rock exposed at the earth’s surface can become sedimentary rocks. Wind, rain and snow break down igneous rocks, to create sedimentary rock.

What are metamorphic rocks? When pieces of igneous rocks and sedimentary rocks get together they are called metamorphic rocks. Temperature and pressure form new minerals in the earth.

What have we learned about rocks? By Yesenia Amigon

What are rocks? Rocks are made up of different minerals. There are more than 2,000 minerals. There are 20 of these minerals found in most rocks.

How are rocks classified? They are classified into three groups. 1. Igneous 2. Metamorphic 3. Sedimentary

How are rocks classified? Rocks are classified by their different shapes, where they were found, and how long they had been there. Metamorphic rocks have two kinds of texture, and are classified by that texture. Rocks that form when pieces of minerals and rocks become cemented together are classified as sedimentary rocks.

What is an igneous rock? Igneous rocks are made of different minerals. Igneous rocks are formed from lava. Lava has very small crystals. Igneous rocks do not have a glassy texture.

What is sedimentary rock? Sedimentary rocks form the same way as concrete. They can contain water for drinking or oil and gas to run cars and heat homes. They tells us what the earth’s surface was like in the geologic past. They can contain fossils that tell us about the past.

What are the different types of sedimentary rocks? 1. Clastic Sedimentary Rock & 2. Non-Clastic Sedimentary Rock

How are Clastic sedimentary rocks formed? Clastic-sedimentary rocks form by the weathering processes which break down rocks into pebble, sand, or clay particles by exposure to wind, ice, and water.

How are non-clastic sedimentary rocks formed? Non-clastic-sedimentary rocks form from chemical reaction. Sedimentary rocks are the only members of the rock family that contains fossils as well as being an indicator of the climate that was present when the rock was formed. Non-clastic sedimentary rocks are made according to the mineral present.

What are metamorphic rocks? Metamorphic rocks are formed within the earth under extremely high pressure. Metamorphic rocks are formed when existing rocks come in contact with magma. Metamorphic rock are formed when existing rocks are placed under great heat and pressure.

Rocks of the World we Have Learned About By Josue Cortes

What are Rocks Rocks are a mixture of minerals usually cemented together. Small rocks found lying on the ground are fragments of larger rocks. Other rocks are so big that they are part of the landscape like Monument Valley in Arizona.

How are rocks classified? Rock divisions occur in three major families based on how they formed: A) Igneous, B) Sedimentary C) Metamorphic.

Igneous rocks are recognized by: The interlocking texture of the grains The presence of vesicles (holes) In extrusive igneous rocks May be dark-colored and heavy May display two grain sizes, one much larger than the other.

Sedimentary rock are recognized by: Grains cemented together The presence of fossils Light-colored and light weight May display interlocking grains but is very light weight.

Metamorphic rock are recognized by: The interlocking texture of large grains Foliation (layering) Banded light and dark colors Ching sound instead of a chunk sound when tapped.

Classification of Igneous Rocks Extrusive igneous rocks form when magma reaches the Earth’s surface and cools quickly. Most extrusive (volcanic) rocks have small crystals. Examples include basalt, hyalite, and diorite. Intrusive igneous rocks form when magma cools slowly below the Earth’s surface. Most intrusive rocks have large, well-formed crystals. Examples include granite, gabbros and diorite.

Classification of Sedimentary Rocks Clastic sedimentary rocks form when weather breaks down rocks into pebble, sand or clay particles. Non-clastic Sedimentary rocks form from chemical reactions chiefly in the ocean. They are named according to the mineral present. Non-clastic and clastic sedimentary rocks are the only members of the rock family that contain fossils and can indicate the climate that was present when the rock was formed

Classification of Metamorphic rocks Foliated metamorphic rocks are formed within the Earth interior under extremely high pressures that occur when the pressure is greater in one direction (directed). This causes the minerals in the original rock to re-orient themselves with the long and flat minerals aligning perpendicular to the greatest pressure direction. Non-foliated metamorphic rocks are formed around igneous intrusions where the temperatures are high but the pressures are relatively low and equal in all directions (confining pressure). The original minerals within the rocks re-crystallize into larger sizes and the atoms become more tightly packed together increasing the density of the rock.

All About Rocks By Sasha Vargas

What are rocks? Rocks are formed of one or more minerals. These minerals are cemented together to form rocks. Rocks and minerals are non-living solids and are found in nature. Earth’s crust is made up of many kinds of rocks.

How are rocks classified? Rocks are classified into three different groups. Igneous Rocks Sedimentary Rocks 3. Metamorphic Rocks

How are rocks formed? The earth’s internal heat causes magma causing the creation of intrusive igneous rocks. Weathering causes rocks to break down at the earth’s surface. It creates sedimentary rocks.

What are igneous rocks? Hot magma liquid moves upward to cooler regions of the earth. It turns cold in the air and becomes crystal igneous rock. There are two different types of igneous rocks. Extrusive – Caused by the cold air outside of the volcano. Intrusive – Caused by the hot magma inside the volcano.

What are sedimentary rocks? Weather carries away rocks exposed at the earth’s surface. Rain, snow, wind and ice break down the rocks, causing sedimentary rocks.

What are metamorphic rocks? Metamorphic rocks are formed within the earth’s interior under extremely high pressure. Metamorphic rocks got their name from the Greek word morphe which means changing of form.

What I learned about rocks There are different kinds of rocks in the world, and rocks are made of different materials. The rocks are called, igneous, sedimentary and also metamorphic. There are also big sedimentary rocks. They form fossils and live for millions of years. A fossil is a rock containing animals bones and plants that lived long ago.

El hermoso mundo de las rocas Por Blanca Mendez

Rocas igneas Cuando el magma o la lava se enfrian lo suficiente estas se solidifican o “congelan’’ y forman las rocas igneas.

Clasificacion de las rocas Las rocas se clasifican en tres grupos: A) Rocas Igneas B) Rocas Sedimentareas C) Rocas Metamorficas

Como reconocer las rocas igneas Una textura apretada de los granos. La presencia de huecos en las rocas igneas volcanicas. Pueden ser de colores oscuros y pesadas. Pueden mostrar dos tamaños de granos.

Clasificacion de las rocas igneas Rocas Extrucivas Igneas. Se producen fuera de la tierra y se enfian rapidamente. Rocas Intrusivas Igneas. Se producen dentro de la tierra y se enfrian lentamente.

Rocas Sedimentareas Las Rocas Sedimentarias. Se forman de pequeños pedazos de Rocas Igneas Sedimentareas y Metamorficas. Estas rocas contienen Fosiles que nos dicen como eran los Animales ,las plantas, y el clima en a quella epoca.

Clasificacion de las rocas Sedimentareas Las rocas sedimentareas se clasifican en: Rocas Sedimentareas Clasticas se forman cuando las rocas Igneas cedimentareas y metamorficas se convierten en piedras pequeñas, arenas o barro por accion del viento, agua, y hielo. Rocas Sedimentareas No-clasticas se forman por reacciones cortas en el oceano. Estas rocas se clasifican de acuerdo al mineral presente en ellas.

Como Reconocer las rocas Sedimentareas Las rocas sedimentareas son reconocidas por : Granos Cementados La presencias de fosiles Color claro y poco peso Los granos estan apretados pero pesan poco.

Como reconocer las rocas Metamorficas La textura de los granos grandes apretados Las capas Bandas de colores claros y oscuros El sonido “ching” en vez del sonido “chunk” cuando se golpea

Mr. Vives and Class 181 at work with technology

Magnets are very cool!