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Stars
Descripción
A concept map exploring Stars - designed for Ms. Reilly's 8th grade science class
Sin etiquetas
stars
life cycle of stars
astronomy
middle school
8th grade
Mapa Mental por
Brianna Reilly
, actualizado hace más de 1 año
Más
Menos
Creado por
Brianna Reilly
hace alrededor de 8 años
343
1
0
Resumen del Recurso
Stars
Properties of stars
Brightness
Absolute Brightness
How bright a star actually is
Apparent Brightness
Decreases as distance increases
How bright a star appears from Earth
Color and Temperature
Surface Temperature determines color
Blue = Hot
Red = cool
Size and Mass
Volume is based on temp and Abs. Brightness
Gravitational interactions determine mass
Positive correlation between Abs Brightness and mass
Mass determines Life Cycle
Composition
Primarily H and He
Measure other elements with Spectral Analysis
Absorption Lines
Emission Lines
Determining Distance to Stars
Stars are lightyears away
Astronomers measure parallax
Life Cycle of Stars
Formation of Stars
Solar Nebula Collabses
Protostar forms at the center
When Temperature and pressure is high enough, nuclear fusion begins
Main Sequence Stars
Stars spend 90% of their life here
Hydrogen Fusion int eh Core
Death of a Star
When the star fuses all H in core into He
Path Dependent on Mass
Low/ Medium Mass Star
Red Giant while fusing He
Release gases - Planetary Nebula
White Dwarf
High Mass Star
Mass more than 8x that of sun
Fuses more elements than He
because temp/pressure in core are high enough
grow into supergiants
Supernova - Violent explosion of dying star
Ejects heavy elements into space
Core collapses into Neutron Star
Spinning Neutron Star = Pulsar
Black Hole
Gravity causes collapse beyond neutron star
Come from extremely massive stars
Surface Gravity so great not even EM waves can escape
dies quickly bc it burns fuel quickly
Recursos multimedia adjuntos
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fbeb867b-9657-41d3-8d33-62446602fda3.gif (image/gif)
9a7537f9-6f90-4e4f-8d81-2d5cd66f9c66 (image/jpg)
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e01742de-3197-4a97-8423-bab011e726e6 (image/jpg)
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