Stars And Galaxies 9th Edition By Seeds – Test Bank

Chapter_11_Formation_and_Structure_of_Stars
1
One of the factors that a large molecular cloud must overcome in order for
gravitational contraction to begin is the thermal energy of the gas.
True
False
2
One of the factors that a large molecular cloud must overcome in order for
gravitational contraction to begin is rotation of the gas cloud.
True
False
3
One trigger that could start the gravitational contraction of a molecular
cloud is a passing shock wave.
True
False
4
When a large gas cloud starts to collapse in a free­fall due to gravity, it will
start to cool down as it contracts because of the atoms fall inward.
True
False
5
One of the major star forming regions in space is the Orion Nebula.
True
False
6
The proton­proton chain for fusing hydrogen into helium is a much more
complicated process than the CNO Cycle for fusing hydrogen into helium.
True
False
7
The temperature at the core of a star must be at least 1 million degrees
Kelvin before fusion can begin.
True
False
8
Main sequence O stars have convective cores because they fuse hydrogen
in the proton­proton chain.
True
False
9
Low mass stars like the Sun transport energy near their surface using
convection.
True
False
10
Convection is important in stars because it transports energy outward in the
star.
True
False