My Earth science vocabulary words list Flashcards

Terms Definitions
radioactivity
ionosphere
layer of electrically charged particles in the thermosphere that absorbs AM radio waves during the day and reflects them back at night
stratopause
the transition between the stratosphere and the mesosphere
capacity
the amount that can be contained
Your Hands
These need to be washed
Magma
a molten mixture of rock-forming substances, gases, and water from the mantle
Bed Load
Sand,pebbles,and boulders that are moved along the bed of a stream and that are too heavy to be carried in suspension.
oceanic crust
The thinnest type of crust.
triangulation
a technique for establishing the distance between any two points
Gully
a miniature valley formed by erosion from heavy rains.
angular unconformities
an unconformity that exists between horizontal sedimentary rock layers and folded or tilted layers of rock
Water
What you use to wash chemical spills
Allergic
If you're ________ to something being used in a lab, tell Mrs. Kirman
compound
a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
weather
the condition of Earth's atmosphere at a particular time and place
reflection
the phenomenon of a propagating wave (light or sound) being thrown back from a surface
element
any substance that cannot be broken down into simpler substances
planetesimal
one of the small asteroid-like bodies that formed the building blocks of the planets
solstace
when the northern or southern most point on earth receives the most sun because the earth is tilted toward the sun
Hypothesis
possible explanation for a set of observations or possible answer to a scientific question
Science
organized way of using evidence to learn about the natural world; also, the body of knowledge that scientists have built up after years of using this process
uranium 238
the radioactive isotope of uranium having an atomic mass of 238 and a half-life of 4.5 billion years
Phanerozoic
the period from about 5,400 million years ago until the present, means "visible life"
Nicolaus Copernicus
Polish astronomer who produced a workable model of the solar system with the sun in the center (1473-1543)
convection currents
The circular movement of substances due to changes in density.
topography
the detailed mapping or charting of the features of an area
solution
a homogeneous mixture of two or more substances
greenhouse effect
natural situation in which heat is retained in Earth's atmosphere by carbon dioxide, methane, water vapor, and other gases
Constant
variable that is not changed in an experiment
System
an organized group of parts that work together to form a whole
amber
hardened tree sap, often a source of insect fossils
Moho
the boundary between the crust and the mantle
Halley's Comet
The comet discovered in 1705 that repeats itself every 76 years and last appeared in 1986.
Igneous Rock
rock formed from cooled magma or lava
Coarse Grain
large crystals; easy to see in texture, intrusively formed
Bio-Chemical Sedimentary Rock
sedimentary rock formed by organic precipitation (shells_ corals_ etc.) of dissolved salts
Discharge
The volume of water flowing past a given point in a stream at a given time.
latitude
the distance north and south of the equator - measured in degrees
scale
a graduated line, as on a map, representing proportionate size
manipulated variable
The one factor that a scientist changes during an experiment; also called independent variable.
matter
Anything that has mass and takes up space.
smelting
the process by which ore is melted to separate the useful metal from other elements
terrestrial planet
planet with a solid, rocky crust; more dense; Inner planet. Mercury, Venus, Earth, Mars
density
the ratio of the mass of a substance to the volume of the substance
Rock Cycle
sequence of events in which rocks are formed, destroyed, altered, and reformed by geological processes
law of superposition
in undisturbed rock layers, the oldest rocks are on the bottom and the youngest rocks are on the top
anticline
a fold in rock that bends upward into an arch
perhelion
point in orbit that is closest to the sun, planet moves faster
inner core
a dense sphere of solid iron and nickel at the center of Earth
Waste
Dispose of all of this as directed by Mrs. Kirman
solar eclipse
when the moon passes between earth and the sun, blocking the sunlight from reaching earth
Quanitative Data
Data that describes the results of an experiment in numbers
Flash Flood
A sudden rush of water , usually caused by a single cloudburst over the narrow valley of a young mountain stream.
topographic map
A map that shows the surface features of an area.
occluded front
a front where a warm air mass is caught between two colder air masses and brings cool temperatures and large amounts of rain and snow
maritime tropical (mT)
warm, moist air mass that is formed over water
red giant
A star that expands and cools once it runs out of hydrogen fuel
legend
the key on a map that tells you what symbol used on the map means what
Base Level
The level of the body of water into a stream used for interferometry.
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