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Midterm Study Set
Terms in this set (39)
rocks that have small or no crystals and form when melted rock cools quickly on Earth's surface
intrusive or extrusive rock that is produced when melted rock from inside Earth cools and hardens
igneous rock with large crystals and forms when magma cools slowly beneath Earth's surface
new rock that forms when existing rock is heated or squeezed
mineral that contain enough of a useful metal that it can be mined and sold for a profit
made from pieces of other rocks, dissolved minerals, or organic matter that collect to form rock layers
remains, imprints, or traces of prehistoric organisms that can tell when and where organisms once lived and how they lived
principle of superposition
states in undisturbed rock layers, the oldest rocks are on the bottom and the rocks become younger toward the top
era of recent life that began about 66 million years ago and continues today
process by which organisms that are suited to a particular environment are better able to survive and reproduce
era of ancient life, when organisms developed hard parts, and ended with mass extinctions
large, ancient land mass that was composed of all the continents joined together
the longest part of Earth's history, lasting from about 4.0 billion to 544 mya
coming closer together↓
getting further away from a common starting point
rigid layer of the Earth made of the crust and part of the upper mantle
where two plates slip past each other side by side
the plastic-like layer of the Earth on which the plates float and move
stress that squeezes rock until it folds or breaks
stress that stretches rock so that it becomes thinner in the middle
stress that pushes a mass of rock in opposite directions.
point on Earth's surface directly above an earthquake's focus
surface along which rocks move when they pass their elastic limit and break
the point below the surface where energy is released in the form of seismic waves.
waves generated by an earthquake.
the draw a conclusion based on an observation
having to do with the quality of something
having to do with an amount or quantity of something
secondary waves- come second
primary waves- first waves
land waves- most damaging waves
the tracing and measurement of a series or network of triangles in order to determine the distances and relative positions of points spread over a territory or region
seriously at risk of extinction.
a species, family, or other larger group having no living members.
map that shows the changes in elevation of Earth's surface and indicates features as roads and cities.
line on a map that connects points of equal elevation
inorganic, solid material found in nature that always has the same chemical makeup, atoms arranged in an orderly pattern, and properties such as cleavage and fracture, color, hardness, and streak and luster
nonrenewable energy source, such as oil and coal, formed over millions of years from the remains of dead plants and other organisms
the middle era of Earth's history
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