Name:
Pd:
HW: Unit 2 Review Guide
Environmental Science
Due Date:
Unit 2: Review Guide
Main Concepts
Features of the Sun
Characteristics of the Sun
Life Cycle of Stars
Characteristics of Stars
Formation of Elements
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Features of the Sun:
What are the features of the sun? Draw a diagram and label it in the space below. Make sure to include
at least 1 defining trait of that part of the sun.
Layers and Features of the Sun
1) Core:
2) Radiative Zone:
3) Convection Zone:
4) Photosphere:
5) Chromosphere:
6) Corona:
7) Sunspots:
Characteristics of the Sun:
Spectral Class:
Mass of our Star? : Small
Age:
Life Expectancy (i.e. how old will it get?):
Distance from the Earth:
Apparent and Absolute Magnitude:
Solar Minimum vs Solar Maximum:
What is a solar flare? :
How can solar flares impact us on Earth?
Medium
Large
Life Cycle of Stars and Formation of Elements
*Fill in the chart with the appropriate stages (Not all lines may be filled for every star)
Small Mass Stars
Medium Mass Stars
Large Mass Stars
Protostar/Nebula
Protostar/Nebula
Protostar/Nebula
Characteristics of Stages and Elements Formed:
Nuclear Fusion:
Life Stage
Protostar/Nebular
Characteristics of Stage
“baby star” beginning stage of
all stars
Elements Formed
No Elements are formed b/c
Nuclear Fusion has not started
Death of small and medium
mass stars. No longer gives off
heat or light
No Elements formed, all nuclear
fusion has ended
Main Sequence
Giant/Red Giant
Supernova
White Dwarf
Black Hole
Nebular Star
Black Dwarf
Characteristics of Stars
Absolute Magnitude:
Apparent Magnitude:
Spectral Type:
Understanding Spectral Type:
Rank Spectral Type from Brightest to Dimmest
Spectral
Type
Rank (bright = 1
dimmest = 7)
Temperature
(K)
Color of Stars
Blue
B
6,000 – 7,500
G
M
Yellow
2,500 – 3,500
Understanding what Spectral Type and Brightness can Tell Us
Word Bank
o
o
o
o
o
o
Dimmer
Brighter
Spectral Type
Closer
Farther
Absolute Magnitude
*not all words will be used.
 Stars with similar
Apparent Magnitudes.
will have very similar
 A star of Spectral Type G1 will be
star of Spectral Type G9.
than a
 A star whose Apparent Magnitude is Lower than its Absolute
Magnitude is
than 32.6 light years away.
 A star in its Main Sequence will appear
the same star in its Giant/Red Giant stage.
than
The Hertzprung Russel Diagram
Explain how to read this diagram, and what info it
tells you.