Download 3-Stars AM Adapted - vhs-ees-am

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Do Now!
1) How many Earths do you think
would fit inside the Sun?
2) How hot do you think the Sun is?
3) How much longer do you think the
Sun will last?
4) How many stars do you think there
are in our Milky Way?
5) How many stars do you think there
are in the whole universe?
Quote of the Week
“We are not as bad as people say we are, nor
are we as good as we think we are…”
-anonymous
Objective: Analyze the life cycle
of stars and apply it to the
Hertzsprung-Russell diagram.
DO NOW ANSWERS
 1. 1 million (1,000,000!) Earths!
 2. 10,000° F!
 3. About 7 billion more years
 4. 200-400 billion
 5. 100,000,000,000,000,000,000,000!
*Stages of a Star
A-Large star
B-Crab Nebula
C-Orion Nebula
F-Nova Cygni
D-Betelgeuse
E-Supernova
G-Supernova
H-Embryonic Star
Black Hole Video Clip
 http://www.youtube.com/watch?v=h1iJXOUMJ
pg
 Scientist Neil Degrasse Tyson
 *What are the different ways that death would
result from a black hole?
Characteristics of Stars
 Apparent magnitude: (a stars brightness as it appears from
EARTH)
 1. how big it is
 2. how hot it is
 3. how far away it is
 Absolute magnitude: how bright a star actually is.
 (ex: 2 stars with equal absolute magnitudes may have
difference apparent magnitudes because one is farther
away!)
 Luminosity measures absolute magnitude.
 Surface temperature: how hot a star is (measured in Kelvins)
Characteristics of Stars
 HR Diagram: a way of organizing stars based
on absolute magnitude and temperature.
 -The hottest main sequence stars are the
brightest
 -The coolest main sequence stars are the
dimmest.
Use the information on luminosity and
apparent magnitude to make a
Hertzsprung-Russell diagram (pg. 704)!
A H-R diagram is a graph that shows the
relationship between the absolute
magnitude and temperature of stars.
 You have 20 minutes…If you finish
early continue reading about the star
life cycle pgs. 707-714
Hertzsprung-Russell diagrams
Stars go through life cycles, just
like people.
Depending on how big a star is,
it will follow a certain life path.
FAST FACT
 In a few billion years, the sun’s core will run out of
hydrogen fuel, triggering nuclear fusion in the
surrounding shell. As a result, the sun’s outer
envelope will expand, producing a red giant
hundreds of times larger and brighter. Intense
solar radiation will boil Earth’s oceans, and solar
winds will drive away Earth’s atmosphere.
Directions
 Draw the Figure 11 on page 710 for:
 A) low-mass stars
 B) medium-mass stars (sun-like)
 C) massive stars
 *Draw the life cycle stages for the 3 types
of stars
 http://www.youtube.com/watch?v=YU6X3
SPZAJo
Definitions on Back
Star Nursery (nebula)
 The birthplace of a star where gas and dust begin to
combine to form the star
Protostar
 the beginning stages of star formation when gravity pulls
in the gas and dusts from the star nursery and it begins to
shine!
Main Sequence Star
90% of all stars in the universe; when stars radiate
(shine) energy into space
Red Giants
 a large bright star with a cool surface. It is formed during
the later stages of the evolution of a star like the Sun, as
it runs out of hydrogen fuel at its center
White Dwarf
Thought to be the final evolutionary state of all stars whose mass
is not too high—over 97% of the stars in our Galaxy; when its
nuclear energy is gone, I begin to contract and appear very
bright
Black Dwarf
Over a very long time, a white dwarf will cool to temperatures
at which it is no longer visible and become a cold black
dwarf; become a lump of coal in the sky when all its nuclear
energy is gone
Supernova
 type of death for Massive and Giant Blue Stars. They are a
stellar explosion of its content material with a burst of radiation
that are very luminous
Blackhole
a region of space in which the gravitational field is so
powerful that nothing, including light, can escape its pull. The
black hole has a one-way surface, called an event horizon,
into which objects can fall, but out of which nothing can
come (form of death for massive stars)
Neutron star
also known as a Pulsar star because of its ‘pulsating’ effect
that can be seen when viewed at a specific angle. The
Pulsar Star is a result of the gravitational collapse of a Giant
Blue Star
Stellar Match!
 Using pages 704-714, match the type
of star with its description.
 You have 10 minutes to complete this
activity.
Homework Directions:
 Write a short story following a star from birth to death.
 Beginning
 At least 3 descriptive sentences about each stage.
 End
 OR
 Illustrate a comic book following a star from birth to
death. Must have drawings AND text (speech/thought
bubbles).
 Beginning
 At least 3 panels for each life stage.
 End
Homework Cont.
 Follow @VHS_EES_AM – HW Grade or bring note
from parent signed.
 Visit Ipadio.com and create your OWN account
and follow my Ipadio account (search:
“Anthony’s Channel”.
 Create your first 1-2 minute podcast! Introduce
yourself to the world. Answer the question: who
are you?!
Exit Ticket
 1. What is the difference between
apparent magnitude and absolute
magnitude?
 2. What two characteristics of stars does a
H-R diagram show?
 3. Draw out the 7 consecutive stages of a
sun-like star (medium-mass).
 4. What type of star ends as a neutron star
or black hole?