Rigid, rocky shell of Earth. Composed of the crust and the upper portion of the mantle.

Plastic, partially molten layer of Earth's mantle. Lithosphere and tectonic plates float on this.

Divergent plate boundaries found on this deep ocean floor where two tectonic plates are pulled apart and new crust forms.

A method used to determine the chronological order of layers of rocks or geological events. Does not determine actual age.

Method used to determine the numerical age of a rock or mineral. Based on its decay or radioactive isotopes.

Multiple forms of an element where each form gas the same amount of protons, but a different number of neutrons.

Breakdown of atomic nuclei into more stable light elements. Released radiation.

Time required for half of an object's unstable;e atoms to decay.

The angular distant North and South of a location is on Earth from the Equator. Expressed in degrees and minutes.

The angular distance East and West a location is on Earth from the Prime Meridian. Expressed in degrees and minutes.

An area on Earth with a uniform agreed upon time. Measured by every 15 degrees longitude. from the Prime Meridian.

The release of trapped glasses from the center of the Earth through volcanic activity. Gave the Earth its atmosphere.

Stream of fast moving charged protons and electrons emitted from the Sun's Corona.

Blue/Green algae that produced much of the atmosphere's oxygen content. Caused the "Great Oxidation Event"

Molecule composed of three oxygen bonded together. Beneficial to human life in atmosphere but poisonous if inhaled

Lowest layer of the atmosphere. Where almost all water vapor is found. Weather occurs in this layer

Second lowest level of atmosphere. The Ozone layer is located here. Very little water vapor, airplanes fly here

Point of a curve where a change in direction occurs. A turning point in a data set.

Boundary between two layers of the atmosphere. Named after the lower of two layers the boundary is between. Ex: Tropopause, stratopause etc.

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Earth Science Terms

Term	Definition
Lithosphere	Rigid, rocky shell of Earth. Composed of the crust and the upper portion of the mantle.
Asthenosphere	Plastic, partially molten layer of Earth's mantle. Lithosphere and tectonic plates float on this.
Mid Ocean Ridge	Divergent plate boundaries found on this deep ocean floor where two tectonic plates are pulled apart and new crust forms.
Relative Dating	A method used to determine the chronological order of layers of rocks or geological events. Does not determine actual age.
Radiometric Dating	Method used to determine the numerical age of a rock or mineral. Based on its decay or radioactive isotopes.
Isotope	Multiple forms of an element where each form gas the same amount of protons, but a different number of neutrons.
Decay	Breakdown of atomic nuclei into more stable light elements. Released radiation.
Half Life	Time required for half of an object's unstable;e atoms to decay.
Latitude	The angular distant North and South of a location is on Earth from the Equator. Expressed in degrees and minutes.
Longitude	The angular distance East and West a location is on Earth from the Prime Meridian. Expressed in degrees and minutes.
time Zone	An area on Earth with a uniform agreed upon time. Measured by every 15 degrees longitude. from the Prime Meridian.
Outgassing	The release of trapped glasses from the center of the Earth through volcanic activity. Gave the Earth its atmosphere.
Solar Wind	Stream of fast moving charged protons and electrons emitted from the Sun's Corona.
Cyanobacteria	Blue/Green algae that produced much of the atmosphere's oxygen content. Caused the "Great Oxidation Event"
Ozone	Molecule composed of three oxygen bonded together. Beneficial to human life in atmosphere but poisonous if inhaled
Troposphere	Lowest layer of the atmosphere. Where almost all water vapor is found. Weather occurs in this layer
Stratosphere	Second lowest level of atmosphere. The Ozone layer is located here. Very little water vapor, airplanes fly here
Inflection point	Point of a curve where a change in direction occurs. A turning point in a data set.
Atmospheric pause	Boundary between two layers of the atmosphere. Named after the lower of two layers the boundary is between. Ex: Tropopause, stratopause etc.

Created by: holiday82

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