It Rocks Rocks and the Rock Cycle Just
- Slides: 19
It Rocks! Rocks and the Rock Cycle
Just what are rocks? A rock is a mixture of minerals, rock fragments, volcanic glass, organic matter, or other natural materials. What do you see in this sample of pink granite?
What is the difference between a rock & a mineral? Minerals are solid, naturally occurring, inorganic, have a fixed composition and are made of one or more elements. Rocks are made of one or more minerals.
Let’s Compare… Made of elements Must be inorganic Made of elements or compounds and must be chemically bonded Naturally occurring Solid Can be made of lava/ magma Have crystals Can be formed from solutions Can be made from organic materials Mixtures made of minerals Can be man made
Rock Classifications Igneous Sedimentary Metamorphic
Igneous Rock Igneous is Greek and means ‘born of fire’ Igneous rock forms when magma, hot molten rock, cools and hardens Igneous rock can be intrusive or
Intrusive Igneous Rock Formed from magma cooled below the Earth’s surface Cools very slowly Forms mineral grains large enough to see with the unaided eye
Extrusive Igneous Rock Formed as lava cools on the surface of the Earth Cools quickly Exposed to air and water which can result in holes in the rock material Forms very fine (small) mineral grains.
Extrusive Igneous Rock Includes Volcanic Glass Lave cools very quickly Few or no minerals grains form Atoms are not arranged in an orderly pattern
Sedimentary Rock Forms when sediments are pressed and cemented together Forms when minerals form from solutions Often form layers If undisturbed by nature, the oldest and first layer is the bottom layer
Sedimentary Rock Compaction – occurs when Sediments are loose pressure on the uppers rock fragments, minerals layers of the sedimentary grains, and bits of shell rock pushes down on the that have been moved lower layers. by the wind, water, ice or Cementation – the process gravity. by which water and Sediments form from the dissolved minerals move processes of weathering through open spaces and erosion form a glue-like substance
Metamorphic Rock Metamorphosis – to change Rocks that have changed their chemical composition due to the presence of extreme heat and pressure or Rocks that have been subjected to hot watery fluids
Metamorphic Rock Can form from igneous, sedimentary or other metamorphic rock Can be foliated mineral grains appear in parallel layers Can be nonfoliated – mineral grains do not align in layers
The What? . . . The Rock Cycle To show rocks slowly change through time, scientists have created a model called the rock cycle. It shows the processes that form and change rocks. The rock cycle shows the three classifications of rock— igneous, metamorphic, and sedimentary—and the processes that form them.
Ro c k C y c l e explains how Rocks and Natural Processes are related Metamorphic ng su lti re , me he at Sedimentary weathering pr es The Igneous
What is the law(principle) of conservation of matter? Law of conservation of matter states that matter cannot be created or destroyed. The changes that take place in the rock cycle never destroy or create matter. The elements are just redistributed in other forms.
Let’s Have Some Fun!!
More Fun with the Rock Cycle http: //tinyurl. com/yzvw 4 k 8 http: //mrhardy. wikispaces. com/Rock+Cycle. swf http: //tinyurl. com/8 g 2 fr 6 f (Study Jams – really great site)
Prepared just for YOU, my 6 th Grade Earth Science classes! Ms. Houston Austin Road Middle School
- Igneous rocks metamorphic rocks and sedimentary rocks
- Igneous metamorphic and sedimentary
- Rock cycle diagram grade 4
- The final six lines of romeo and juliet
- Chapter 3 standardized test practice answers
- A rock climber's shoe loosens a rock and her climbing buddy
- Extrusive rock
- Volcanic rocks and plutonic rocks
- Rock cycle sedimentary
- Rock climb
- Sedimentary rock concept map
- Concept map of metamorphic rock
- How does soil link the rock cycle and biosphere?
- Rock types and cycle quick check
- Rock cycle explanation and diagram
- Rock cycle comic strip
- Rock cycle song (sedimentary igneous metamorphic)
- Rock cycle
- Rock cycle picture
- Cementation rocks