Download Section 3: Evolution of Stars pages 114-119

Ch. 1 Exploring Space Outline (Book objectives and Figures)
Section 1: Radiation from Space pages 8-13
 Obj: Explain the electromagnetic spectrum The arrangement of electromagnetic radiation emitted from a star.
 Large to small wavelengths: Radio, Microwave, Infrared, Visible, Ultraviolet, x-ray, Gamma rays
 Obj: Identify the difference between refracting and reflecting telescopes Reflecting telescopes use MIRRIORS!
Ch. 4 Stars Outline (Book objectives and Figures)
Section 1: Stars pages 104-107
 Obj: Explain why some constellations are only visible during certain season Because the earth is in constant motion. The earth orbits the sun so during certain seasons the earth is different
locations around the sun so there are different stars visible in the night time sky.
 Obj: Distinguish between absolute and apparent magnitude Absolute magnitude is the TRUE brightness of a star compared to other stars and apparent magnitude is what you
see with your own eyes from earth.
Section 2: The Sun pages 109-112
 Obj: Explain that the Sun is the closet star to Earth It is the center of the solar system, light from the sun reaches earth in about 8 min. and light from other stars takes
many of years!
 Obj: Describe the structure of the Sun Copy figure 6 p.109 into your notes (Sun diagram)
 Photosphere- lowest layer and the layer that gives off light
 Chromospheres- middle layer above the photosphere
 Corona- outermost layer extending millions of km out into space
 Obj: Describe sunspots, prominences, and solar flares Sunspots- darker, somewhat cooler areas on the suns surface
 Prominences- huge arching columns of gas
 Solar flares- bright bursts of light, gases and energy
Section 3: Evolution of Stars pages 114-119
 Obj: Describe how stars are classified Stars are classified by their size, temperature, color and brightness
 Obj: Compare the sun to other types of stars on the H-R diagram
 Our sun is average in terms of size, temperature, brightness, and color. It is a main sequence star.
 Describe how stars evolve See figure 13 p.117
 Low mass stars- nebula, low-mass star, main sequence, Red giant, White dwarf
 High mass stars- nebula, high-mass star, main sequence, Red supergiant, supernova, Neutron or Black hole
Section 4: Galaxies and the Universe pages 120-125
 Obj: Describe the sun’s position in the Milky Way galaxy On the outer edge of the galaxy on a spiral arm
Section 3 Evolution of Stars (PowerPoint Notes)
Name: ______________________________________
 Stars
 A massive sphere of plasma ___________________________________ that forms out of a protostar.
 A star is born when the contracting gas and dust become so hot that nuclear fusion starts.
 Are classified by:
 ____________________________________________________
 Protostar
 __________________ pulls huge nebulas of hydrogen gas and dust into a single spinning cloud.
 As the particles crash into each other, the matter heats up….about 15 million degrees.
 A star comes to life when ________________ begins.
 H-R diagram:
 A graph relating the _____________________________________________________________.
 Main sequence:
 90% of all stars
 As temperature increase so does the _____________________________.
 Describe how stars evolve See figure 13 p.117
Copy this diagram on the backside of this sheet or in your notes!
 _________________- nebula, low-mass star, main sequence, Red giant, White dwarf
 _________________- nebula, high-mass star, main sequence, Red supergiant, supernova, Neutron or Black hole
Section 3 Evolution of Stars (PowerPoint Notes)
Name: ______________________________________
 Stars
 A massive sphere of plasma ___________________________________ that forms out of a protostar.
 A star is born when the contracting gas and dust become so hot that nuclear fusion starts.
 Are classified by:
 ____________________________________________________
 Protostar
 __________________ pulls huge nebulas of hydrogen gas and dust into a single spinning cloud.
 As the particles crash into each other, the matter heats up….about 15 million degrees.
 A star comes to life when ________________ begins.
 H-R diagram:
 A graph relating the _____________________________________________________________.
 Main sequence:
 90% of all stars
 As temperature increase so does the _____________________________.
 Describe how stars evolve See figure 13 p.117
Copy this diagram on the backside of this sheet or in your notes!
 _________________- nebula, low-mass star, main sequence, Red giant, White dwarf
 _________________- nebula, high-mass star, main sequence, Red supergiant, supernova, Neutron or Black hole