What distance method did Edwin Hubble use to determine the distance to local galaxies?
a. Hubble Law
b. Supernova observations
c. Period-luminosity relationship of variable stars
d. Parallax
C
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How is the age of the galaxy determined?
a. measuring the metallicity of Population II stars b. finding the turnoff point in the H-R diagram of globular clusters c. from the motion of stars in the galactic halo d. counting the number of open clusters in the spiral arms
Most of the larger moons of gas giants were formed at the same time as the gas giants, but somewhere else in the Solar System, and captured by the gas giants later.
Answer the following statement true (T) or false (F)
Doppler radar is replacing conventional radar in weather forecasting because
a. it can measure wind speeds. b. Doppler radar is widely used in police cars. c. it is cheaper. d. government agencies are required to use the latest equipment.
For a system undergoing an adiabatic process,
a. 
b. 
c. 
d. 
e. 