Solar System
The Largest body in our solar system is____
The Sun
Why do the positions of stars change in the universe?
Universe is Expanding
Which category of the electromagnetic spectrum has the greater wavelength?
Microwaves
Why would your weight change if you went to a different Planet?
different gravitational pulls.
What two gases make up the sun?
Hydrogen and Helium
As planets get father away from the sun they _____
a) are warmer
b) are smaller
c) have fewer moons
d) have longer revolution times
D. Longer revolution times
The temperature of a star can be estimated using _____
a) intensity of the light emitted
b) color of the light emitted
c) stellar biochemical activity
B) color of the light emitted
Which color of the Visible light spectrum has the highest frequency?
Violet
A galaxy is best described as a cluster of
a) hundreds of stars
b) thousands of stars
c) millions of stars
d) billions of stars
D) Billions of stars
Nebula
What is the Earth-centered Solar System Called?
Geocentric
What is the source of energy for the sun?
Nuclear fusion of Hydrogen
Which Emission Spectra has 6 spectral lines
Carbon
a) Saturn is less dense than Earth
b) Saturn is much farther from the Sun than Earth
c) Saturn rotates more rapidly
c) Saturn rotates more rapidly
Based on the red shift data on galaxies, most astronomers infer that the universe is currently _______
Expanding
What are 2 characteristics of the inner planets
Small
Dense
Rocky
What stage do the most massive stars end their life -cycle with?
Black hole
How long does it take for a core to collapse?
1/4 of a second
Which process occurs in a controlled fusion reaction (nucleosynthesis)?
a) light nuclei collide to produce heavier nuclei
b) heavy nuclei collide to produce lighter nuclei
c) neutron bombardment splits lighter nuclei
a) light nuclei collide to produce heavier nuclei
The star Arcturus has a temperature of 4560K and a luminosity of 170 solar units, what type of star is Arcturus classified as?
Giant
What type of model is our solar system classified as?
Heliocentric.
What are the 4 characteristics used to classify a star
Color
Brightness (luminosity)
Temperature
Mass
What is the heaviest element that a massive star can fuse to in its core?
Fe (Iron)
For main Sequence stars state the relationship between temperature and luminosity
As Temperature increases, luminosity also increases.
Cosmic background radiations provide direct evidence for the origin of _______________
The Universe