Rock Types
The type of rock formed when molten hot magma cools.
What is igneous rock?
This process on the crust and the mantle of Earth builds, destroys and changes rocks over time.
What is The Rock Cycle?
The name for a scientist that studies fossils.
What is a paleontologist?
Scientists believe that the Earth is around this many years old.
What is 4.6 billion years?
This layer of the Earth is the thinnest layer.
What is the Crust?
The type of rock that has been changed as a result of high heat or pressure.
What is metamorphic rock?
The process of rocks being broken down by water, wind, or gravity.
What is weathering?
Footprints, trails, and nests are all examples of this type of fossil.
What is a Trace Fossil?
When scientists find the age of a rock by comparing to the age of other rocks, they are find this.
What is relative age?
This layer of Earth is incredibly hot but is made of solid rock.
What is the Mantle?
This type of rock may contain the remains of dead plants or animals.
What is sedimentary rock?
The process of sediment, soil or other small pieces of rock being moved as a result of water, wind, or gravity.
What is erosion?
This type of fossil is the result of minerals seeping through sediment and hardening to create a solid copy of the organism.
What is a cast fossil?
When geologists are able to find out the exact age of a rock, they are finding this.
What is absolute age?
Seismic waves are an example of this type of evidence because geologists cannot see directly into the Earth's core.
What is indirect evidence?
This type of rock is the result of weathering, erosion, and cementation.
What is sedimentary rock?
The process of dropping or depositing sediment that has been moved by water, wind, or gravity.
What is deposition?
This type of fossil is a hollow area in sediment left behind after an organism decomposes.
What is a mold fossil?
Geologists use this type of fossil to identify and match rock layers as well as observe how different species evolved.
What is an Index Fossil?
Geologists use rock samples to gather this type of evidence.
What is direct evidence?
This type of rock may be made up of layers that are distorted or bent.
What is metamorphic rock?
This process of one plate moving below another helps continue to rock cycle by forcing large amounts of rock into the Earth's mantle.
What is subduction?
This word, meaning "turned to stone", is used to describe fossils that have been hardened over time by minerals that seep into the cells of an organism.
What is petrified?
According to this law, the youngest layers of rock will be closest to the surface while the oldest layers of rock will be located deeper down.
What is the Law of Superposition?
As you move deeper into the center of Earth, these two conditions become so extreme that humans cannot survive
What is temperature and pressure?