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Exam Study guide chapter 1-10
semester 1
107
Science
8th Grade
12/15/2011

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Term

science

 

Definition
way of learning about the natural world
Term
3 major skills
Definition
observing, inferring, predicting
Term
observing
Definition
using one or more of your senses to gather information
Term
inferring
Definition
when you explain or interpret things you observe
Term
predicting
Definition
making a forecast
Term
steps of scientific inquiry
Definition
posing questions, developing a hypothesis, designing an experiment, collecting data, drawing conclusions
Term
manipulative variable
Definition
variable that the scientist changes
Term

responding variable

 

Definition
varable that changes because of the manipulative variable
Term
theory
Definition
well-tested scientific concept that explains a wide range of observations ; not proven every time
Term
law
Definition
statement that describes what scientists expect to happen every time under a set of particular conditions; proven true every time
Term
Big ideas of earth science
Definition
structure of the earths system, earths history, earth in the solar system
Term

branches of earth science

 

Definition
geology, oceanography, meteorology, astronomy, environmental science
Term
model
Definition
taking something complex and making it simpler
Term
technology
Definition
makes things easier
Term
things a topographical map shows us
Definition
relief, elevation, landforms
Term
elevation
Definition
height about sea level
Term
relief
Definition
difference in elevation between the highest and lowest parts of an area
Term
3 landforms
Definition
plains, plateaus, mountains
Term
globe
Definition
better than a map ; more proportional
Term
equator
Definition
latitude ; N to S
Term
prime meridian
Definition
longitude; E to W
Term
contour lines
Definition
shows elevation
Term
what is the lowest point on a topographical map?
Definition
water
Term
what is a mineral
Definition
naturally occuring, inorganic solid that has a crystal structure and a definite chemical composition
Term
naturally occuring
Definition
formed by the process of the natural world
Term
inorganic
Definition
cannot be from a living organism
Term
solid
Definition
at room temperature
Term
crystal structure
Definition

each type of mineral has a different structure of the crystals

 

Term
definite chemical composition
Definition
each mineral contains certain elements in definite proportions
Term
characteristics to identify a mineral
Definition
streak , luster, density, hardness, color, cleavage and fracture, crystal systems, special properties
Term
density
Definition
mass over volume
Term
cleavage
Definition
splits along a flat surface
Term
fracture
Definition
how it looks when it breaks apart in an irregular way
Term
ways minerals form
Definition
magma and lava
Term
solution
Definition
mixture when one substance is dissolved into another
Term
uses of minerals
Definition
jewelry, metals, medicine
Term
gem
Definition
once it has been cut and polished
Term
gemstone
Definition
hard, colorful mineral that has a brilliant or glassy luster
Term
strip mining
Definition
taking a layer off the top of the earth
Term
shaft mining
Definition
holes deep in the earth
Term
open pit mining
Definition
dig big hole in the ground ; deeep!
Term
alloy
Definition
solid mixture of two or more elements and a metal
Term
smelting
Definition
ore is mixed with other substances then melted to separate metals from the other substances
Term
learn about earths interior
Definition
rock samples & seismic waves
Term
crust
Definition
oceanic and continental
Term
mantle
Definition
lithosphere, asthenosphere, lower
Term
inner core
Definition
metal
Term
heat
Definition
movement / energy
Term
types of heat transfer
Definition
conduction, radiation, convection
Term
conduction
Definition

within a material or between materials that are touching

ex. cuddling <3

Term
radiation
Definition
transfer of energy through space
Term
convection
Definition
movement within a liquid
Term
midoceanic range
Definition
mountains underwater
Term
subduction
Definition
ocean floor sinks under a deep ocean trench and back into the mantle
Term
divergent
Definition
2 plates move apart; where volcanoes occur
Term
convergent
Definition
two plates come together; mountains form here
Term
transform
Definition
two plates slip past each other; earthquakes occur here
Term
tension
Definition
pulls it apart, causing it to be thinner in the middle
Term
compression
Definition
squeezes rock together until it folds
Term
shearing
Definition
pushes a mass of rock in two opposite directions
Term
fault
Definition
break in rock
Term
hanging wall
Definition
block of rock that lies above
Term
footwall
Definition
rock that lies below
Term
syncline
Definition
a fold in the rock that goes downward
Term
3 seismic waves
Definition
p waves, s waves, surface waves
Term
seismograph
Definition
instrument that records seismic waves
Term
mercalli
Definition
measures damage
Term
richter
Definition
highest point of energy released in the earthquake
Term
moment magnitude
Definition
estimates total energy released
Term
epicenter
Definition
where the earthquake reaches the ground
Term
focus
Definition
where it starts underground
Term
tiltmeter
Definition
measures vertical movement with water
Term
creep meter
Definition
horizontal movement with a wire
Term
laser
Definition
horizontal movement with laser reflector
Term
gps satellite
Definition
measures change in elevation and horizontal movement; best way of seeing movement
Term
tsunami
Definition
large wave
Term
liquefaction
Definition
turns soil into mud
Term
base isolated structure
Definition
reduces amount of energy that reaches a building
Term
Ring of Fire
Definition
major volcanic belt in the the Pacific Ocean
Term
island arc
Definition

string of islands.

ex: japan

Term
hot spot
Definition
area where material from deep below the mantle rises then melts
Term
magma
Definition
under the earthh
Term
lava
Definition
molten stuff when it reaches the earths surface
Term
chemical property
Definition
changes in composition
Term
physical property
Definition

not the composition of the substance

ex: change of color

Term
burning
Definition
chemical property because it mixes with oxygen in order to burn ( burnnn baby burnn )
Term
viscosity
Definition
thickness
Term
silica
Definition
makes lava thicker
Term
active
Definition
is erupting or will erupt in the NEAR future
Term
dormant
Definition
"sleeping"  but it can erupt but in the DISTANT future
Term
extinct
Definition
not expected to ever erupt again
Term
batholith
Definition
huge rock masses
Term
hot spring
Definition
pool of water heated by a near body of magma
Term
geyser
Definition
fountain of water and steam that erupts from the ground
Term
geothermal activity
Definition
can be used as a source of energy
Term
fossils
Definition
preserved remains or traces of livings things
Term
petrified fossils
Definition
minerals replace all or some of the organism
Term
trace fossils
Definition

imprints

ex. footprints

Term
carbon films
Definition
all materials evaporate except that carbon so all that is left is a film of carbon
Term
preserved remains
Definition
actual body
Term
relative dating
Definition
age of rock compared to other rocks
Term
absolute dating
Definition
exact age from date of formation
Term
index fossils
Definition
used to determine the relative age of a rock
Term
layers mean what?
Definition
how things were buried . NOT AGE !
Term
law of superposition
Definition
the lower the rock , the older it is
Term
unconformity
Definition
gap in geologice records
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