8.8A Properties of the Electromagnetic Spectrum
8.8B History of the Electromagnetic Spectrum
8.9A Stars & HR Diagram
8.9B Galaxies
8.9C Theories vs. Laws
100
What two elements are stars primarily composed of?
Hydrogen and Helium
100
Galaxies are classified by?
Shape
100
What is the same about all stars?
Made up of the same materials
100
What measures brightness of a star relative to other stars?
Absolute Magnitude
100
This theory was developed by finding patterns in motion of which objects?
Galaxies
200
What characteristics are shown on the HR Diagram?
Temperature and Brightness
200
Where is the Sun located in the Milky Way galaxy?
Near the edge, between center and edge
200
What is a light year used to measure?
Galaxy Size
200
What causes stars to have different colors?
Different surface temperatures
200
What is a system of ideas that explains observations and makes predictions?
Theory
300
What type of stars have a luminosity of 10^5 and a temperature of 3,000 Kelvin?
Red Supergiants
300
Which waves on the electromagnetic spectrum can be seen by humans?
Visible Light Waves
300
Which idea eventually grew into the Big Bang model of the universe?
If all of the matter in the universe is expanding, then it must have started out much smaller.
300
Where in the milky way is the sun?
Middle between the center of the galaxy and the edge
300
If a theory states that there is "no beginning or end and is infinite in size" what evidence might have been used to develop this theory?
Universe has no visible edges
400
How old is Earth?
13.8 billion years old
400
What is used to classify electromagnetic waves?
Wavelength
400
What measures a stars brightness based on its appearance as seen from Earth?
Apparent Magnitude
400
What does Hubble's Law show us?
Galaxies farther away move faster than galaxies closer
400
What is a descriptive statement or equation that predicts events under specific conditions?
Law
500
Draw and label the parts of the life cycle of stars
500
Which expansion theory is supported by the following:
a. cosmic microwave background
b. hydrogen and helium
c. age of the universe
Big Bang Theory
500
What is the first stage in a stars life cycle?
Nebula
500
What is an object that sucks everything in; including light, and form when a galaxy or star collapses under the pull of its own gravity?
Black Hole
500
What type of galaxy is this?
Elliptical