Unit 1
A statement that helps to explain a concept or phenomenon based on conditions and evidence
What is a theory?
The explanation of how the solar system formed from a cloud of dust and gas
What is The Nebular Hypothesis?
This is the movement of one celestial object around another.
What is revolution (revolving)?
The least dense layer of earth broken up into 12 large plates
What is the crust/lithosphere?
True or false: Geologic changes take place both catastrophically and gradually?
What is True?
This piece of evidence proves that the universe is still expanding based on the Doppler effect.
What is a redshift?
This % amount of mass remains at the center of our solar systems with the Sun.
What is 99%?
There are this many kepler's laws
Convection currents occur in this layer causing the movement of tectonic plates
What is the mantle/asthenosphere?
The Geologic time scale is broken down into __ main divisions.
What is 4?
This theory helps explains the origin of our universe as a singular expansion that is continuing today.
What is the Big Bang Theory?
Due to this force, larger planets tend to have more moons.
What is gravity?
Kepler's 3rd law states that the farther the planet is away from the sun, the ___________ its period of revolution is.
What is longer?
This layer is responsible for creating the earth's magnetic field by rotating in a counterclockwise motion
What is the outer core?
This type of plate boundary has two plates colliding to form subduction zones and mountains.
What is convergent boundaries?
This is radiation and energy distributed all over space in all directions that is left over from the big bang.
What is Cosmic Microwave Background Radiation?
A cloud of dust and gas responsible for forming our solar system
what is a nebula?
When the Southern hemisphere is receiving direct sunlight and the Northern Hemisphere is not, it is this season in the Southern Hemisphere
What is Summer?
We know this layer is a solid because the p-waves speed up once they arrive here
What is the inner core?
This plate boundary is responsible for creating new crust at mid-ocean ridges because of seafloor spreading.
What is a divergent boundary?
These two elements are the most abundant in the universe
What is hydrogen & helium?
This determines the life cycle stages of a star.
What is beginning mass?
When the Earth, a NEW Moon, and Sun are lined up in a straight line creating a shadow on the Earth.
This layer is a liquid and we know that because the the s-waves not traveling through it
What is the outer core?
If rock layer B is younger than C, older than A, but C is younger than D. then what is the oldest rock layer? (assuming no disturbances)
What is rock layer D?