Definition
An imaginary line that runs from the North Pole to the South Pole.
Axis
A model used by Greeks that put's the earth at the center of the universe
Geocentric Model
A model proposed by Copernicus that put the sun at the center of the universe
Heliocentric Model
The movement of the earth around the sun
Revolution
The rotation of earth's spinning on its axis
Rotation
Deflection of a freely moving object because of earth's rotation; like water or air.
Coriolis effect
The outer part of the shadow that is still somewhat lit during an eclipse.
Seismic Wave that travels through the body of a planet.
Body Wave
seismology
The rocky outer layer of Earth's surface.
Crest
When the position of the Sun is halfway between its position during solstices.
Equinox
When the moon passes directly between Earth and the Sun
Solar Eclipse
Highest point of a wave
Crest
Seismic waves that travel along the ground surface.
Surface Wave
The middle layer of Earth
Mantle
When the position of the Sun is closest to the poles.
Solstice
Inner cone-shaped part of a shadow when all light is blocked during an eclipse.
Umbra
Primary Waves
P-Waves
The layer below the lithosphere
Asthenosphere
The layer of solid, brittle rock that makes up Earth's surface.
Lithosphere
When the Moon passes directly behind Earth and into its shadow.
Lunar Eclipse
The height of a wave from the center to the top.
Amplitude
Sedimentary Waves
S-Waves
Core
The movement of material due to differences in temperature.
Convection