HR Diagram
Star Properties
Star Stages
Graph/Table
Just for Fun
100
What is the color of the stars with the lowest surface temperature?
?
Red
100
True or False- Larger stars (with more mass) have a shorter life cycle
True
100
What is a supernova?
A star that explodes upon death
100
What is the surface temperature of class A stars? 
7,500-11,000K
100
What are the 8 planets in our solar system?
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
200
Where on the HR Diagram do you find the brightest stars?
Top of the diagram
200
What is the luminosity of the sun?
1
200
A relatively small, dense star at the end of its life cycle, which generates little energy creating a faint white light.
What stage is this star in?
White Dwarf
200
Pollux is what type of star? 
Giant
200
Why do astronauts float in space?
There is no gravity
300
What is the surface temperature of the sun?
About 6,000
300
What fuel do stars use?
Hydrogen
300
What is a black hole?
A black hole is a place in space where gravity pulls so much that even light can not get out.
300
Which star is the hottest? (see board)
20x
300
Which 4 planets have rings?
Saturn, Jupiter, Uranus, Neptune
400
Which type of stars have a high temperature and low luminosity?
White Dwarfs
400
Why does the sun appear to be the brightest star?
The sun is the closest star to earth and so it seems brighter than distant stars
400
A very large star of high luminosity and low surface temperature. These stars are thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion.
What stage in the life cycle does this describe?
Red Giant
400
Which mass of a star has the brightest appearance? (see board)
40x
400
Who was the first person to walk on the moon?
Neil Armstrong
500
The least amount of the stars on the HR Diagram are classified as what type of stars?
White Dwarfs
500
What are the hottest and coldest class of stars?
O, B, A, F, G, K, M
Hot- O
Cold- M
500
The process begins when a nebula starts to shrink, then divides into smaller swirling clumps. Each clump becomes ball shaped and it continues to shrink the material in it as it gets hotter and hotter. When the temperature reaches 18 million degrees Fahrenheit, a massive explain called nuclear fusion occurs.
The above process is describing what?
A birth of a star
500
How much time does the sun spend in the main sequence? (see board)
8993 million years
500
Why do comets develop tails?
Tails develop as the comet approaches the sun and the frozen gases begin to melt. The tail always points away from the sun due to the solar winds.