8.8A Properties of Stars and the Electromagnetic Spectrum
8.8B Electromagnetic Spectrum and Extra Galaxies
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 is a universe mostly made up of?
Empty space
100
What is a descriptive statement or equation that predicts events under specific conditions?
Law
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 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
200
What evidence supports the theory that stars and galaxies are separated by great distances?
Universe is expanding and was once much smaller
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
What causes stars to have different colors?
Different surface temperatures
300
Why does the Sun appear to be the largest star from Earth?
Sun is the closest star to Earth
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 color would a star be that is very hot and on the main sequence?
Blue
400
What type of galaxy is this?
Elliptical
400
What does Hubble's Law show us?
Galaxies farther away move faster than galaxies closer
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
Identify the type of galaxy below
Irregular
500
What is a system of ideas that explains observations and makes predictions?
Theory