Miss Cooper’s 5th Grade Classroom:

Rock Types and

The Rock Cycle

What can you tell me about rocks?

What have you observed about rocks? (shape, texture, color)

Do you have a favorite type of rock?

RocksSedimentary

Formation: formed at surface of the earth; mainly fused sediments that have collected together

Examples: mud, sand, gravel, sandstone

Flickr, subarcticmike, Mike Beauregardhttp://www.flickr.com/photos/31856336@N03/4718776101/

Where can you find sedimentary rocks?

• Any guesses?

Mountains

Rock formations

Igneous

• Formation: formed from melted rocks that have cooled and solidified

• Examples: magma, granite, basalt

Flickr, Adventures of Pam and Frank http://www.flickr.com/photos/adventurespf/3228207246/

Where can you find igneous rocks?

• Any guesses?

Lava!

The earth’s crust

Metamorphic

• Formation: deformed and recrystallized magma from the earth’s crust

• Examples: slate, quartzite

Flickr, Shandchem, http://www.flickr.com/photos/14508691@N08/4053465765/

Where can you find metamorphic rocks?

• Any guesses?

Magma

The earth’s crust

The Rock Cycle

http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.html

What is weathering?

According to Wikipedia, “Weathering is the breaking down of rocks, soils and minerals as well as artificial materials through contact with the Earth's atmosphere, biota and waters.”

-Wikipedia, the free encyclopedia

[Weathering]http://en.wikipedia.org/wiki/Weathering

What is erosion?According to Wikipedia, “Erosion is the process by which material is removed from a region of the Earth’s surface. It can occur by weathering and transport of solids in the natural environment, and leads to the deposition of these materials elsewhere. It usually occurs due to transport by wind, water, or ice.”

-Wikipedia, the free encyclopedia

[Erosion]

http://en.wikipedia.org/wiki/Erosion

What is compaction?According to Wikipedia, “Compaction (geology) refers to the process by which a sediment progressively loses its porosity due to the effects of loading. As more sediment is deposited above the layer, the effect of the increased loading is to increase the particle-to-particle stresses resulting in porosity reduction primarily through a more efficient packing of the particles.”

-Wikipedia, the free encyclopedia

[Compaction]

http://en.wikipedia.org/wiki/Compaction_(geology)

What is cementation?According to Wikipedia, “Cementation involves ions carried in groundwater chemically precipitating to form new crystalline material within sediment pores; this is how "sediment" becomes "rock". The new pore-filling minerals form "bridges" between original sediment grains, thereby binding them together. So sand becomes "sandstone", and gravel becomes "conglomerate”.”

-Wikipedia, the free encyclopedia

[Cementation]http://en.wikipedia.org/wiki/Cementation_(geology)

Homework

Pick one fact/something interesting you learned about today and write about it in your science journals. Just one paragraph. Be prepared to hand this assignment in tomorrow!

References• http://www.cotf.edu/ete/modules/msese/earthsysflr/rock.html (rock cycle picture)

• http://www.rocks-rock.com/rock-types.html (rock types info)

• http://www.historicechopark.org/id128.html (rocks on each slide)

• http://www.flickr.com/photos/31856336@N03/4718776101/ (sandstone picture)

• http://www.flickr.com/photos/adventurespf/3228207246/ (igneous picture)

• http://www.flickr.com/photos/14508691@N08/4053465765/ (metamorphic picture)

• http://en.wikipedia.org/wiki/Compaction_(geology) (compaction info)

• http://en.wikipedia.org/wiki/Erosion (erosion info)

• http://en.wikipedia.org/wiki/Weathering (weathering info)

• http://en.wikipedia.org/wiki/Cementation_(geology) (cementation info)