Warm Up What causes day and night?

Why do we experience season’s?

What divides the Earth into northern and southern hemispheres?

What is a revolution?

If the northern hemisphere is experiencing spring, what is the southern hemisphere experiencing?

Explain the difference between nutation and precession.

Activating

stratgegy1. 1) How many Earths do you think

would fit inside the Sun?2. 2) How hot do you think the Sun is?3. 3) How much longer do you think the

Sun will last? 4. 4) How many stars do you think

there are in our Milky Way?5. 5) How many stars do you think

there are in the whole universe?

Quote of the Day

Life is not about waiting for the storm to subside. It’s about learning to dance in the rain!

Objective & LEQ Objective: SWBAT analyze the

life cycle of stars and apply it to the Hertzsprung-Russell diagram.

LEQ: What determines the life cycle of a star and how is it applied to the Hertzsprung-Russell diagram?

Table of ContentsLeft Side Item Page Right Side Items Page

T-Chart Planets 0 Solar System Formation CN

1

Kepler 22b Article 0 Planetary Motion CN 3

Universe Venn Diagram

0 Star CN 5

Season’s Foldable 2

Season’s Graphic Organizer

2

HR Diagram 4

Star Foldable 4

Science GEMS of Wisdom

Page Avid Strategy W I C O R

0 T-Chart Planets

0 Kepler 22b Article

0 Universe Venn Diagram

2 Season’s Foldable

2 Season’s Graphic Organizer

4 HR Diagram

4 Star Foldable

Warm Up ANSWERS

1. 1 million (1,000,000!) Earths!

2. 10,000°million F!

3. About 7 billion more years

4. 200-400 billion

5. 100,000,000,000,000,000,000,000!

Quiz! You may use your notes

ABSOLUTELY NO TALKING First time, verbal warning and -5 points Second time, zero on your quiz

Once you are finished, hold up your quiz and I will collect it.

You have 3 things to finish: Make sure you have a SUMMARY written for your

notes yesterday (**remember, the summary answers the LEQ)!

Finish chunking/coloring notes Finish the worksheet and foldable (it was HW)

*Stages of a Star

A-Large star B-Crab NebulaC-Orion Nebula

D-Betelgeuse

E-Supernova

F-Nova Cygni

G-SupernovaH-Embryonic Star

Black Hole Video Clip

http://www.youtube.com/watch?v=h1iJXOUMJpg

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 graph that shows the relationship between the absolute magnitude and temperature of stars.

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)!Draw your own HR Diagram

using the chart on page 704 as an example!!

You have 20 minutes…work smart!

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.

What determines the life cycle of a star?

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 Complete the star foldable and

lifecycle diagram using pages 707-711 in your textbook 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

This will be glued/taped onto page 6 of your notebook!

http://www.youtube.com/watch?v=YU6X3SPZAJo

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 DwarfThought 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 DwarfOver 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

Blackholea 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 staralso 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!

Cut out the star stages and definitions

Match the start stage with the correct definition

Glue it into your notebook on page 6

Using pages 704-714, match the type of star with its description.

You have 10 minutes to complete this activity.

Star Story: 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

Textbook Activities

Read pages 703 – 704 and 706. Answer questions 4 – 5 on page 706.

Read pages 707 – 714. Answer questions 1-4 on page 714.

Read pages 622 – 624: Answer questions 1 and 2 on page 629.

Read pages 644 – 647: Answer questions 1-6 on page 648.

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?