Shared Flashcard Set

Details

Stars and Galaxies Tsmothers
Stars and Galaxies
29
Geology
7th Grade
02/22/2013

Additional Geology Flashcards

 


 

Cards

Term
Constellation
Definition
a group of stars that forms a pattern in the sky that looks like familiar animal or character
Term
Absolute Magnitude
Definition
Measure of the amount of light a star actually gives off
Term
Apparent Magnitude
Definition
Measure of the amount of light from a star that is recieved on Earth
Term
Light-year
Definition
Unit representing the distance light travels in one year- about 9.5 trillion km- used to record distances between stars and galaxies
Term
Photosphere
Definition
lowest layer of the Sun's atmosphere; givs off light
Term
Corona
Definition
outermost, largest layer of the Sun's atmosphere
Term
Chromesphere
Definition
Layer of the Sun's atmosphere above the photosphere
Term
Sunspot
Definition
Areas on the Sun's surface that are cooler and less bright than surrounding areas, are caused by the Sun's magnetic field, and occur in cycles
Term
Nebula
Definition
Large cloud of gas dust that contracts under gravitational force and breaks apart into smaller pieces
Term
Supergiant
Definition
Late stage in the life cycle of a massive star in which the core heats up, heavy elements form by fusion, and the star expands; can eventually explode to form a supernova
Term
Giant
Definition
late stage in the life of comparatively low-mass main sequence star in which hydrogen in the core is deleted
Term
Neutron Star
Definition
Collapsed core of a supernova that can shrink to about 20 km in diamter and contains only neutrons in the dense core
Term
White Dwarf
Definition
late stage in the life cycle of a comparatively low-mass main sequence star
Term
Black Hole
Definition
final stage in the evolution of a very massive star, where the core's mas collapses to a point that it's gravity is so strong that not even light can escape
Term
Galaxy
Definition
large group of stars, dust, and gas held together by gravity; can be elliptical, spiral, or irregular
Term
Big Bang Theory
Definition
states that about 13.7 billiton years ago, the universe began a huge, fiery explosion
Term
CMEs
Definition
they are Coronal Mass Ejectons
Term
Prominences
Definition
Huge, arching columns of gas
Term
Solar Flare
Definition
Outward, high speed violent eruptions
Term
Main Sequence
Definition
the graph of star's sizes and brightness
Term
Albert Einstein
Definition
proposed a theory of how energy is generated
Term
10% of stars
Definition
Dwarfs and Giants
Term
After supernova it changes to
Definition
Neutron star or Black Hole
Term
Low mass stars change to
Definition
Red Giants
Term
Fusion
Definition
heat that causes atoms to fuse
Term
Galaxies
Definition
Spiral, Elliptical, and Irregular
Term
The milky way may contain
Definition
1 trillion stars
Term
THe theory to which time began
Definition
THe Big Bang Theory
Term
Polaris
Definition
another name for the North star
Supporting users have an ad free experience!