LC1: The Big Bang Theory
What scientific theory explains that the universe began in an extremely hot, dense state that has been expanding and cooling overtime?
THE BIG BANG THEORY
What is the main factor that determines a star's life cycle and final stage?
INITIAL MASS
What shape describes the paths planets follow around the Sun according to Kepler's First Law?
ELLIPSE
What process fuels the sun?
NUCLEAR FUSION
What does Hubble's Law indicate about the Universe?
What are the two most abundant elements in th euniverse?
Hydrogen and Helium
What conditions are needed for NUCLEAR FUSION to occur?
HIGH PRESSURE
HIGH TEMPERATURE
According to Kepler's Second Law, What happens to planet speed as it moves closer to the sun?
Planet speed INCREASES
What can you classify about stars using an H-R Diagram? (Hint: There's 4)
Size
Temperature
Luminosity
Lifecycle of a Star
What is the term for light shifting to longer and low frequency wavelengths. (Hint: indicates an object is moving away.)
Redshifting
What is the name of the leftover radiation from the early universe detected in every direction?
Cosmic Microwave Background Radiation
What element forms when hydrogen fuses in the Sun's Core?
Helium
A planet has an orbital eccentricity of 0.02. Is its orbit more circular or more elliptical?
CIRCULAR
How does Energy produced in the Sun's Core reach Earth?
ELECTROMAGNETIC RADIATION
a.k.a light waves
What do scientist use to determine a star's composition?
ABSORPTION LINES
EMISSION/ABSORPTION SPECTRA
According to Hubble's Law, how does the speed at which a galaxy moves away relate to its distance?
when star distance INCREASES, star speed INCREASES
Two stars have different initial masses: Star A has a solar mass of 1 and Star B has a solar mass of 25. Which is more likely to form a black hole?
Star B
If focal length (f) is 5 and major length distance (d) is 9 what is the eccentricity?
e = f/d
0.56
How will the ratio of hydrogen and helium in the sun's core change overtime
HYDROGEN WILL DECREASE
HELIUM WILL INCREASE
When massive stars achieve a supernova stage will they form heavier elements than iron or light elements?
HEAVIER ELEMENTS THAN IRON
A scientist observes that light from several distant galaxies has shifted toward longer wavelengths. What does this suggest about the galaxies and the universe?
Universe is Cooling
During nuclear fusion, what happens to the total number of protons and neutrons in the reaction?
STAYS THE SAME
IS ALWAYS CONSERVED
If the average distance from the sun (a) is 4 AU, what is the orbital period (P)?
P2 = a3
P = 8
What telescope provides evidence for the BIG BANG THEORY?
JAMES WEBB TELESCOPE
WHat telescope has the same orbit as other planets in space?
PARKER SOLAR PROBE