[DOC] [TLE] The Three Categories of Rocks and the Rock Cycle - dummies [PAR] Each type of rock has its own unique characteristics: Igneous: Igneous rocks form from the cooling of melted rock (either lava or magma) into solid form. Metamorphic: Metamorphic rocks form when existing rocks are subjected to intense heat and pressure, usually deep below the earth's surface. [DOC] [TLE] Interactives . The Rock Cycle . Types of Rocks - Annenberg Learner [PAR] The three main types, or classes, of rock are sedimentary, metamorphic, and ... 
shiny crystals, formed by minerals growing slowly over time, on their surface. [DOC] [TLE] The types of rock: igneous, metarmorphic and sedimentary [PAR] Jan 12, 2015 ... The three main types of geological rocks are described. ... Science ROCKS! ... 
They were either sedimentary or igneous (or even metamorphic), and they ... so 
close to magma that they start to partially melt and change their properties. ... 
Sedimentary rocks are quite difficult to classify, as you can look at the... [DOC] [TLE] Types of Rocks: The Three Major Rock Groups - Video & Lesson ... [PAR] Furthermore, did you know that rocks exist in three general forms: igneous,... ... 
Scientists are always looking for ways to put things into categories, and rocks ... 
There are two main types of sedimentary rocks, based on the source of the 
sediment. ... Metamorphic rocks are formed from pre-existing igneous, 
sedimentary, and... [DOC] [TLE] Rock (geology) - Wikipedia [PAR] In geology, rock or stone is a naturally occurring solid aggregate of one or more 
minerals or ... Three major groups of rocks are defined: igneous, sedimentary, 
and metamorphic. ... Rocks are geologically classified according to 
characteristics such as ... Metamorphic rocks are formed by subjecting any rock 
typesedimentary... [DOC] [TLE] How do scientists classify rocks? | Reference.com [PAR] Geologists classify rocks according to the processes by which they were formed. 
Igneous, metamorphic and sedimentary rocks have unique histories, and each ... 
of other types erode away from their beds and are transported to a common... [DOC] [TLE] Types of Rocks - Kids Love Rocks [PAR] Geologist classify rocks into three basic groups based on how they were ... and 
sedimentary rocks show this fact by their appearance and the minerals they 
contain. ... Some kinds of metamorphic rocks--granite gneiss and biotite schist 
are two... [DOC] [TLE] Classification of Common Rocks - Appalachian State University [PAR] Most rocks now exposed at the surface of the Earth formed in or on continental or 
... There are three major classes of rocks, IGNEOUS, SEDIMENTARY, and ... 
common igneous, sedimentary and metamorphic rocks, and learn to classify 
them. ... classification, the kinds of minerals and their proportions, or 
MINERALOGY, are... [DOC] [TLE] How to Identify the Three Types of Rocks: Igneous, Sedimentary ... [PAR] Jul 8, 2011 ... Classifying the Three Types of Rocks: Igneous, Sedimentary, and Metamorphic 
Rocks ... There are three basic types of rocks that planet Earth is composed of: 
igneous, sedimentary, and metamorphic. ... Common types of metamorphic rocks, 
such as marble, schist, and gneiss ... Expertly Written Science & [DOC] [TLE] The three main rock types - The Geography Site [PAR] Earth Science. Types of Rocks: Igneous, Metamorphic and Sedimentary ... There 
are many different rocks on the Earth and other planets, but every single one can 
be fitted ... Classify these rocks according to the groups to which they belong. [DOC] [TLE] Earth Science for Kids: Rocks, Rock Cycle, and Formation - Ducksters [PAR] Scientists generally classify rocks by how they were made or formed. There are 
three major types of rocks: Metamorphic, Igneous, and Sedimentary. [DOC] [TLE] High School Earth Science/Types of Rocks - Wikibooks, open books ... [PAR] High School Earth Science. Edits to this ... Explain how each of the three main 
rock types are formed. ... Rocks are classified according to how they were formed. 
... There are three main types of rocks; igneous, sedimentary, and metamorphic. [DOC] [TLE] 9 Sedimentary, igneous and metamorphic rocks - Wiley

Question: For science, classify rocks according to their 3 main types: metamorphic, sedimentary & this
Answer: igneous