Science Flashcards
Rock cycle
A rock forms, changes from one type to another is destroyed and formed again by geological process
How are rocks classified
Composition and texture
How are igneous rocks formed?
Magma solidifying
Extrusive
Rock that forms as a result of volcanic activity near the earths surface
How are sedimentary rocks formed
Weathering occurs and breaks rocks into fragments
Three classes of sedimentary rocks
Clastic, chemical, organic
How are metamorphic rocks formed
When heat and pressure of the new environment changes
What are the 2 classes of metamorphic rocks
Foliated unfoliated
Weathering
Breaking down of rocks
Mechanical weathering
Physical changes
Chemical weathering
Chemical changes
Erosion
Movement of sediment
5 agents of erosion
Gravity, wind, running water, glaciers, waves
Deposition
Sediment is deposited
Contact metamorphosism
Occurs near igneous intrusions
Regional metamorphosism
Pressure builds up on rocks that are buried deep below other rocks
Mefic rocks
Dark colored rocks Rich in calcium iron magnesium
Felsic
Light colored rocks Rich in aluminum potassium silicon
Rock
Naturally occurring solid mixture of one or more minerals or organic matter
Intrusive
Rock beneath the earths surface formed from cooling/ solidification of magma
