Stars and H-R Diagram
What is the life cycle stage of our sun?
Main Sequence
What process gives the sun energy?
Nuclear Fusion
Kepler's 1st Law states that planets orbit in what shape?
ellipical
What are the two waves that travel through Earth's interior?
P and S waves
What is the outermost layer of the Earth called?
The crust
What life cycle stage is a star with a luminosity of about 10,000 and temperature around 5,000 K?
Supergiant
What are the two main elements involved in nuclear fusion?
hydrogen & helium
True or False: all planets orbit in the sun in a circular shape
False
Which waves can travel through solids, liquids and gases?
P waves
Which layer is liquid?
Outer core
What has a great effect on a star's life cycle?
It's mass
What element is commonly found in stars approaching the end of their life cycle?
iron
Kepler's Third Law says a planet's orbital period depends on this.
Its distance from the sun
Which waves can only travel through solids?
S waves
Which layer do you expect to be the most dense?
Inner core
What is the force that pulls gases in a star together?
Gravity
Why do large stars have shorter lifespans?
They burn through fuel faster
Which planet would take longer to make one full rotation around the sun: one closer to the sun or farther away from it?
Closer
Which waves are faster?
P waves
As you move deeper into the earth, what generally happens to the4 density?
it increases
What are the 4 major regions on an H-R diagram?
main sequence, giants, supergiants, and white dwarfs
Why is chemical combustion not a good source of energy for stars?
It doesn't provide as much energy as nuclear fusion
Which planet would orbit the sun faster: Earth or Venus?
Venus
What shape do P waves have?
wavy
What happens to iron rich lava when it cools?
It points north