Earth's Layers
This is the top layer on Earth
What is the crust?
The name of the supercontinent that broke apart approximately 200 million years ago
What is Pangaea?
The approximate age of the Earth
What is 4.6 billion years
The rock type formed when magma or lava cools and hardens
What is igneous?
Finish the phrase...Oceanic crust is more ____ than ______ crust.
What are dense and continental?
What Earth's mantle is mostly made of
What is liquid magma?
The name of the scientist who proposed the Theory of Continental Drift
Who is Alfred Wegener?
Finish the phrase...life started in the _____ and moved to _____.
What are ocean and land?
The rock type created by extreme heat and pressure
What is metamorphic?
The name of the geologic age of a fossil or rock when compared to other fossils or rocks (not an exact number)
What is relative age?
The activity in the Earth's mantle that causes tectonic plates to move
What are convection currents?
The type of plate boundary interaction whereby the plates slide past one another
What is transform?
Of mammals appearing, the extinction of the dinosaurs, or single-cell organisms appearing, the one that occurred last
What is the dinosaurs becoming extinct?
The rock type formed by years and years of sediment compacting (pressing) together and becoming cemented
What is sedimentary?
A number that is an estimate of a rock's age based on elements that are found in the rock
What is absolute age?
The 'sphere' that contains the rocky part of the Earth's crust
What is the lithosphere?
The type of plate boundary subduction can occur in
What is convergent?
Of humans appearing, mammals appearing, or fish appearing, the one that occurred first
What is fish appearing?
The process when natural forces like wind, water, and ice carry away and move bits of rock and soil from one place to another
What is erosion?
The plate boundary interactions that earthquakes can occur in
What are all of them?!
Along with nickel, this element makes up Earth's core
What is iron?
Other than deep-ocean trenches, these are what a convergent boundary creates
What are mountains?
The purpose of the Earth's geologic time scale
What is to show Earth's history and events?
How metamorphic, igneous, and sedimentary rock break down into sediment
What are weathering and erosion?
The type of plate boundary that causes a rift valley to form
What is divergent?