Rock Cycle Day 2

Rock Cycle - Day 2

​Describe how metamorphic rocks formed

Describe how igneous rocks form

Identify common uses of igneous and metamorphic rocks

​Objectives:

contact metamorphism
regional metamorphism
foliated
non-foliated
intrusive
extrusive
metamorphic rock
igneous rock

​

​Vocabulary

​Igneous rocks form from cooled lava or magma. If they have a lot of silica they tend to be light colored rocks and if they have low levels of silica then they tend to be darker in color.

Igneous Rocks

Igneous Rocks

Igneous rocks are grouped by the size of their crystals and the minerals they contain.

Draw

Circle the prefix that represents inside in blue and outside in red.

Intrusive

Extrusive

​Granite is a speckled rock. It is used for counters. It comes in a variety of colors.

Granite

​Diorite is black, white and gray. It looks like a Dalmation. It was used for statues a lot in olden times.

Diorite

Gabbro is green to black in color.

Gabbro

​Pegmatite is pink or green in color.

​​Pegmatite

​Extrusive Igneous Rocks - Formed from Magma, Cool Slowly & has Large Crystals

​A shiny black rock also considered glass. It can be used as tools such as axes or spears.

​​Obsidian

​Pumice is one of two rocks that can float on water. There are lots of air holes. It is used in pumice stone, facial scrubs and other skin treatments.

​​Pumice

​Basalt is a dark rock tha makes up 90% of volcanic rocks. It creates the columns we say in the video.

​​Basalt

​Extrusive Igneous Rock - Form from Lava, Cool Quickly & has Small Crystals

Metamorphic Rocks

​Metamorphic rock forms from heat and pressure added to a rock. This causes the crystals to melt or meld and form a new rock. Formed in two ways and creates Two types of Metamorphic Rock.

​Regional occurs over a large area. The pressure from layers of dirt and rock above cause heat and a change in crystals to occur.
Ex: Gneiss

Regional Metamorphosis

​Rock comes close or in contact with magma which heats up the crystals and creates a new rock.
Ex: Hornfels

​​Contact Metamorphosis

Gneiss is formed from Granite being placed under heat and pressure. See the similar colors in the two rocks?

Gneiss

Slate forms from Shale being placed under extreme heat and pressure. Slate is very thin and was used for black boards and for shingles on houses.

Slate

​Schist was mica and quartz before turning into schist.

Schist

​FOLIATED METAMORPHIC ROCK - HAS LAYERS

​Marble forms from Limestone being placed under heat and pressure. It is used in bathrooms and for art like sculptures. It can be smoothed and be shiny too.

​​Marble

​IF you add heat and pressure to sandstone you get quartzite.

​​Quartzite

​Hornfel was once a combination of a few other rocks like gabbro, granite, limestone and shale.

​​Hornfel

​Non Foliated Metamorphic Rock

Categorize

Options (7)

Extrusive

Intrusive

Foliated

Non foliated

Chemical

Organic

Detrital

Organize these options into the right categories

Igneous

Metamorphic

Sedimentary

Categorize

Options (9)

Coal

Sandstone

Limestone

Granite

Pumice

Slate

Gneiss

Quartzite

Marble

Organize these options into the right categories

Sedimentary

Igneous

Metamorphic

Poll

Which type of rock do you feel most confident about?

• Igneous

• Metamorphic

• Sedimentary

Labeling

Label the Rock cycle diagram.

Drag labels to their correct position on the image

weathering & erosion

Heat and Pressure

Sedimentary Rock

Cooling

Sediments

Metamorphic Rock

Igneous Rock