Geologic Time Scale
True or False. A layer that is beneath another layer of rock would be older.
What is true.
Preserved remains or traces of living things
What is a fossil
Pangea also known as ______
What is Supercontinent?
Scientist who study fossils
What is a paleontologist?
Name the 3 main kinds of plate boundaries.
What is Convergent boundary, Divergent boundary and Transform boundary.
This idea states that lower layers of rocks in a series are older and upper layers of rocks are younger.
What is superposition?
These special fossils indicate to scientists boundaries in geologic time.
What are index fossils.
Arrangement of events used as a measure of the relative or absolute age of any part of geologic time.
What is Geologic Time Scale?
Scientist who collect and analyze data such as the size, location and depth of earthquakes.
What is a seismologist?
Describe the layers of the Earth.
What is The Earth’s crust is the top layer. Next comes the mantle which is made of hot solid rock that can move very slowly over years. The inner-most layer is the core. The core is the hottest but is a solid due to being made mostly of iron and nickel under intense pressure from all the rock above it.
This is how long ago the Earth was formed.
What is 4.6 Billion Years ago?
This is the type of rock that most fossils are found in. Typically made of other materials compressed together.
What is sedimentary rock?
Rocks that form when sediment from erosion is compressed together
What is Sedimentary Rocks?
Scientists that study the composition of Earth, including land formations and rock layers.
What is a geologist?
Describe the 3 main kinds of plate boundaries.
What is Convergent boundaries are where boundaries move towards each other. Divergent boundaries are when plates move apart. Transform boundaries are when plates slide past each other.
This is the Era that we are living in now.
What is the Cenozoic Era?
T/F You can sometimes tell the age of fossils by comparing them to similar rocks they are next to.
What is True?
When small pieces of rock (sediment) are moved around by wind and/or water
What is Erosion?
Scientist who also study seismic data and plate tectonics.
What is Volcanologist?
What is subduction and what causes it?
What is Subduction occurs when two plates converge, and one slides under the other. This is common when continental plates meet oceanic plates. Because the oceanic plate is denser, it slides under the continental plate.
This is the age of a rock as compared to another rock.
What is relative age?
If a living organism no longer exist
What is extinct
When rocks are broken down into smaller pieces
What is Weathering?
Scientist inspect how strata and rocks are layered through geologic time.
What is sedimentologists and stratigraphers?
How does convection work and how does it move tectonic plates?
What is Convection is the process of warm fluids rising and cooler fluids sinking. Inside the Earth, convection is powered by heat mostly from the core. The slow circulation of rock in the mantle moves the tectonic plates at the surface.