30 terms

Earth Science 1

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Active Fault
a crack in Earth's surface where earthquakes take place
Aqueduct
A canal used for transporting large quantities of flowing water over long distances
Aquifer
An underground layer of rock or soil filled with water
Bedrock
solid rock surface underneath the soil
Carbon Cycle
the continuous exchange of carbon dioxide and oxygen among living things
Compression
a movement of plates that presses together or squeeze Earth's crust
Condensation
the changing of a gas into a liquid
Continental Drift
the idea that a supercontinent (Pangea) split apart into pieces, the continents, which drifted in time to their present location
Contour Interval
the difference in elevation between side-by-side contour lines on a topographic map
Convergent Boundary
a place where tectonic plates are colliding
Core
the center of Earth, lying below the mantle
Crust
the rocky surface that makes up the top of the lithosphere and includes the continents and the ocean floor
Deposition
the dropping off bits of eroded rock
Divergant Boundary
a place where tectonic plates are moving apart
Element
pure substances that cannot be broken down into any simpler substances
Elevation
how high a place is above sea level
Erosion
picking up and carrying away pieces of rocks
Evaporation
the changing of liquid into gas
Gem
a mineral valued for being rare and beautiful
Excavate
to dig out and remove
Geology
the study of Earth
Ground water
water that seeps into the ground into spaces between bits of rock and soil
Hydrosphere
Earth's water, whether found in continents and oceans and includes the fresh water in ice, lakes, rivers, and underground water
Ore
a mineral containing a useful substance
Percolation
precipitation that flows down through or is retained by soil and rocks
Periodic Table
a table in which the elements are arranged in groups with similar properties
Plate
one of the pieces of the Earth's crust that "floats" on the mantle
Plate Tectonics
Earth's surface is made of plates that slide slowly across the mantle
Precipitation
Any form of water particles that fall from the atmosphere and reach the ground
Contour Line
A line on a topographic map that connects points with the same elevation