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Science 2
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48
Science
9th Grade
01/09/2010

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Cards

Term
Mass governs a stars:
Definition
  • Temp
  • Luminosity
  • diameter
Term
Stars consit mostly of:
Definition
Hydrogen and Helium
Term
The increase of mass=
Definition
the increase of gravity pulling inward
Term
Nebula
Definition
A cloud of intersteller gas and dust
Term
protostar
Definition
A hot condensted object at the center of a Nebula
Term
The first reaction to nuclear fusion is to-
Definition
convert Hydrogen into Helium
Term
Neutron Star
Definition
A collapsed core of a star that forms quicly while the outer layers fall inward
Term
Pulsar
Definition
a spinning neutron star the exhibits a pulsing pattern
Term
Supernova
Definition
Massive explosin that occur when the outer layers of a star are blown off
Term
Black Hole
Definition
small extremely dense remnant of a star whose gravity is so immence theat not even light can escape it.
Term
What are the most abundant elemst found in a star?
Definition
Hydrogen and Helium
Term
current theory that explains how the niverse was formed?
Definition
Big Bang Theory
Term
What cant eh spectra of light from a star tell us about the star?
Definition
The elemts that make it up.
Term
Kepler's 2nd law?
Definition
A plants sweeps out equal amounts of area in equal amounts of time
Term
Cosmology
Definition

The study of the universe

-it's nature, orgin, and evolution-

Term
The Universe's two opposing forces?
Definition
momentum of the outward expansion oppsed by the inward force of gravity acting on the matter of the universe to slow the expansion
Term
What must be known in order to canculate the age of the univ.?
Definition
the rate of expansion
Term
Open univ.
Definition
Univ. expands and never contracts
Term
Closed Univ.
Definition
the univ. expands and then contracts
Term
Flat univ.
Definition
the expansion slows to a halt in a certain amount of time
Term
Cosmic Background Radiation
Definition
Weak radiation that appeared to come from all directons in space
Term
What instrument is used to study the surfaace of the ocean floor?
Definition
Magnetometer
Term
3 plate boundries
Definition
Convergent, Divergent, and Transform
Term
What fetures corrospond with each of the types of plate bounderies
Definition

C - mount.

D - rift valleys

T - fault line

Term
Magnetic reversal
Definition
occurs when flow in the outer core changes and Earth's magnetic feild changes direction.
Term
Paleomagnetism
Definition
the stud of Earth's magnetic feild
Term
isochron
Definition
an imaginary line ona map that shows points that have the same age - that is formed at the same time.
Term
tectonic plates
Definition
the pbroken peices of the crust that lie on the mantle and fit together
Term
indepenedent variable
Definition
the factor that is changed by the experimenter
Term
dependent variable
Definition
the factor that is affected by the changes
Term
control
Definition
used to compare redults to
Term
investigation
Definition
does not include a control
Term
experimentation
Definition
when all aspects can be controlled
Term
Layers of the Armosphere from clostest to farthest away
Definition

toposphere

stratosphere

mesophere

thermosphere

exospere

Term
describe the ozone layer
Definition

-found in the stratoshpere

-absorbs ultraviolet rays from the sun

Term
4 types of fronts
Definition

cold

warm

occluded

stationary

Term
describe cold front
Definition

-cold air forces warm air upward

-intense precipitation and thunderstorms

Term
describe warm front
Definition

-warm air displaces cold air

-widespread light precipitation

Term
describe stationary front
Definition

-when two air masses meet but neither advances

-light winds and precipitation

Term
describe occluded front
Definition

-when two cold air masses met and for warm air upward

-strong winds and heavy precipitation

Term

l>

l>

l>

l>

what front does this belong to?

Definition
cold
Term

Cl

Cl

Cl

Cl

what front does this sign belong to?

Definition
warm
Term

Cl

    l>

Cl

    l>

what front does this sign belong to?

Definition
sationary
Term

Cl

<l

Cl

<l

what front does this sign belong to?

Definition
occluded
Term
describe a high high pressure system
Definition

-sinking air moves away from center when it reaches the surface

-pleasent/fair weather

Term

describe movement of air in the hemisphere for a:

high pressure system

Definition

NH: clockwise

SH: counterclockwise

Term
describe a low pressure system
Definition

-air spirals inward then upward

-air condenses into clouds and precipitation

Term

describe movement of air in the hemisphere for a:

low pressure system

Definition

NH: counterclockwise

SH:clockwise

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