Study Guide Chapter 19

Study Guide Test on Chapter 19.

Understand the phases of the moon.

Understand the H-R diagram

Understand the temp/color/composition of stars

Understand the difference between galaxy types

Understand the big dipper is like a clock and how to read that clock.

Know how to use a star tracker.

Explain the life cycle of a star depending on its starting mass.

Know galaxy worksheet - basics of galaxies and black holes and super galaxies

Understand the meaning of each variable in the Drake equation.  F sub capital L?

Essay: Explain the cuases of the seasons in detail.  Give examples using the Poles and Tropic Lines.

Spectrum Apparent magnitude Absolute magnitude Light-year Parallax H-R diagram Main sequence White dwarf Red giant Supernova Neutron star Pulsar Black hole Galaxy Spiral galaxy Elliptical galaxy Irregular galaxy Nebula Open cluster Globular cluster Quasar Gibbous Crescent Waxing Waning Solstice Equinox Aphelion Perihelion Angular Heigth of the Sun

Honors:

·         Math using speed of light and scientific notatio

·         Math calculating the distance and time to travel to certain stars or size and distance between galaxies calculated.

·         Use the Drake equation given certain variables

·        What is Dark Matter and Dark Energy?

Do Now: Stars Spectra

What does the surface color of a star tell us? Explain in detail. Then explain what is an absorption spectra.

Sources of continuous, emission, and absorption spectra

Sources of continuous, emission, and absorption spectra

http://csep10.phys.utk.edu/astr162/lect/light/absorption.html
Thus, emission spectra are produced by thin gases in which the atoms do not experience many collisions (because of the low density). The emission lines correspond to photons of discrete energies that are emitted when excited atomic states in the gas make transitions back to lower-lying levels.

A continuum spectrum results when the gas pressures are higher. Generally, solids, liquids, or dense gases emit light at all wavelengths when heated.

An absorption spectrum occurs when light passes through a cold, dilute gas and atoms in the gas absorb at characteristic frequencies; since the re-emitted light is unlikely to be emitted in the same direction as the absorbed photon, this gives rise to dark lines (absence of light) in the spectrum.

Youngest Supernova Hunter

Youngest Super Nova Hunter