Earth's Layers
The reason earth has layers
What is density?
any evidence of former life that is partially preserved
What is a fossil?
The study of spectral lines from different atoms and molecules.
a very large ball of gas, that glows from its own energy. aka self luminous
What is a star?
scientist who proposed the theory of continental drift
Who is Alfred Wegner?
The least dense layer of the earth where humans live... some say it is "lit" here
What is the lithosphere?
A phenomena when a species no longer exists
What is extinction?
A plot of the intensity of light at different frequencies. Or the distribution of wavelengths and frequencies.
What is a spectrum?
The process of intense heat and pressure within the star that actually squeeze the hydrogen atoms together to form helium
What is nuclear fusion?
the driving force behind the movement of earth's plates
What are convection currents?
This layer of earth is soft and flows like lava
What is the asthenosphere?
This is the shortest time period used to measure geologic time
What is a epoch?
A widely accepted model of the Universe that assumes that the observed expansion of the Universe originated about 13.7 billion years ago, when the Universe was very hot and very dense.
What is Big Bang Theory?
The giant cloud of gas and dust from which the star was born
What is a nebula?
This type of plate boundary is when two plates come together, forms mountains and volcanoes
What is convergent?
Earth's liquid layer of iron and nickle
What is an eon?
An apparent shift toward longer wavelengths of spectral lines in the radiation emitted by an object caused by the emitting object moving away from the observer.
What is redshift?
The life cycle of a star is determined by this characteristic
What is mass?
This type of plate boundary is when two plates slide past each other, example: San Andreas fault can create earthquakes
What is a transform boundary?
The most dense layer of earth composed of solid iron and nickle
What is the inner core?
This dating method is based on the relationship between objects
What is relative age?
Major Piece of evidence for the big bang theory, primal glow, it is believed to be the cosmologically redshifted radiation released by the Big Bang itself.
What is cosmic background radiation?
The core collapses in less than a second, causing an explosion called a
What is a supernova?
This type of plate boundary is when two plates move apart, creates mid ocean ridges and deep trenches
What is divergent?