Volcanoes
Molten rock under the earth's crust
magma
A single massive event of energy released from breaking crustal rock
earthquake
The interconnection of geologic processes by which one rock type is changed into another rock type
rock cycle
The four outer planets that are composed primarily of hydrogen and helium
The gas giants (Jupiter, Saturn, Uranus, Neptune)
a force of attraction that pulls objects toward each other
gravity
Volcano that is erupting or showing signs of erupting
active volcano
Smaller earthquakes that follow a major earthquake and occur near the start of the original earthquake
aftershock
Rock that forms from cooling magma or lave
igneous
A gas cloud found in galaxies where stars can form
Nebula
A curved path a celestial body takes to travel around another celestial body
orbit
Molten rock that is extruded through the surface of the earth's crust
The first energy waves released by an earthquake that have a pulsing effect; also called P waves
Primary waves
Rock that has changed form due to intense heat and pressure
metamorphic
The surface of the sun that we are able to see
photosphere
blocking of the sun's light when the moon comes between the sun and the earth
solar eclipse
Large belt of volcanic islands on the boundary of the Pacific Coast
ring of fire
The point on the surface of the earth directly about the focus of an earthquake
epicenter
A solid, inorganic material with a crystal structure that is formed by natural processes
mineral
The currently accepted theory that our sun is the center of the universe
heliocentric
The highest high tide that occurs when the moon, sun , and earth are in line with each other
spring tide
A volcano that will probably never erupt again
Extinct volcano
A surface or plane on which rock breaks
fault
A physical property of minerals that describes the way light reflects off of a mineral's surface
luster
The average distance from the sun to earth, about 150,000,000 kilometers
astronomical unit
the phase of the moon when the sunlit portion of the moon is getting larger
waxing moon