Types of Rocks
This type of rock forms when magma or lava cools.
What is igneous rock?
Magma cooling forms this type of rock.
What is igneous rock?
The outermost layer of Earth.
What is the crust?
These pieces of Earth’s crust move slowly over time.
What are tectonic plates?
The history of the Earth is shown on this timeline.
What is the geologic time scale?
This rock type forms from sediments being pressed together.
What is sedimentary rock?
Sediments becoming rock is called this process.
What is compaction and cementation?
The thickest layer of Earth.
What is the mantle?
Tectonic Plates move this slowly
What is a centimeter per year
These are preserved remains or traces of ancient life.
What are fossils?
Rock changed by heat and pressure becomes this.
What is metamorphic rock?
Heat and pressure are needed to form this rock type.
What is metamorphic rock?
This hot liquid metal layer lies beneath the mantle.
What is the outer core?
Plates sliding past each other create these natural events.
What are earthquakes?
The oldest rock layers are found in this position.
What is the bottom?
This rock type is most likely to contain fossils.
What is sedimentary rock?
Weathering and erosion break rock into these.
What are sediments?
This solid layer is the innermost part of Earth.
What is the inner core?
This type of boundary forms mountains when plates collide.
What is a convergent boundary?
This era is known as the “Age of Mammals.”
What is the Cenozoic Era?
These 3 rock types make up the rock cycle.
What are igneous, sedimentary, and metamorphic?
In the rock cycle, this must happen to form magma.
What is melting?
The crust and upper mantle together are called this.
What is the lithosphere?
This helps scientists track plate movement today.
What are satellite measurements?
The geologic time scale is divided into these parts.
What are eras, periods, and epochs?