Classifying Rocks
Geologists classify rocks into 3 major groups
What is igneous, sedimentary, and metamorphic
Igneous rock that formed from magma and cooled very slowly UNDERNEATH the earth's surface is called ________.
What is intrusive rock
These small pieces or particles make up sedimentary rock. They can be other rocks or plant and animal organisms
What is sediments
This is how metamorphic rocks are created.
What is extreme heat and pressure
The type of rock that forms from magma or lava cooling
What is igneous rock
This type of rock is formed from lava ON the earth's surface.
What is extrusive rock
This type of rock can be found on the local streets during the winter.
What is rock salt
These types of rocks can become metamorphic rocks
What is igneous, sedimentary and other metamorphic rocks
The small units that make up a rock and its texture are called __________.
What is grains
Daily Double - An extrusive rock with dark color, fine grains and low silica
Daily Double - What is basalt.
This stone is what the Whitehouse is made out of.
What sandstone
This is a thin rock that was used instead of paper
What is slate?
Geologists study the ________ & ________ of a rock in order to identify it.
What is texture and composition
This type of igneous rock is black with a glassy texture. There is a picture in your textbook.
What is obsidan
This type of rock is formed by organisms. Coal was the example we gave in class.
What is the biochemical or organic rock
The texture of a metamorphic rock arranged in parallel layers is called
What is foliated
Igneous rock cools very quickly.When it forms the rock could be described as _________.
What is smooth or shiny or no visible crystals
This igneous rock can float in water, and some people use it to clean their feet
What is pumice
This type of sedimentary rock is made up of broken pieces of rock and minerals
What is clastic rock
What does metamorphic mean?
What is "to change form"?