Rocks
This type of rock forms when melted rock cools and hardens.
Igneous
A mineral must have this property-no man made materials allowed.
These are the preserved remains or traces of ancient living things.
fossils
The names of the 2 types of plates.
continental and ocean
This gas makes up 78% of Earth's atmosphere
Nitrogen
Heat and pressure deep within Earth can change one rock into this type of rock.
metamorphic
Luster
Fossils are most commonly found in this type of rock.
sedimentary
This is the boundary when two plates collide.
Convergent
Process by which ice changes directly to gas.
Sublimation
Gneiss is an example of this type of rock
metamorphic
The hardest mineral on Mohs scale.
diamond
These parts of organisms are most likely to become preserved.
hard parts
The San Andreas fault is formed at this type of plate boundary.
transform
This scale measures the strength of earthquakes
Richter
When rocks break down into sediment.
weathering
Daily Double
The softest mineral on Mohs scale. Used to be found in powder
talc
This was the environment in which all early organisms lived.
aquatic
The oldest mountain range in North America.
Appalachian Mountains
DAILY DOUBLE
This tool helps scientists determine the direction of Earth's magnetic field.
compass
This means to compact and cement. To become rock
lithification
The three most common minerals at Earth's surface.
Quartz, Feldspar, Mica
Scientists who study fossils and ancient life.
paleontologists
The nickname for the active subduction zones in the pacific ocean creating numerous volcanoes.
ring of fire
The famous supercontinent that existed about 300 million years ago.
Pangaea