Practice Quiz

MTEL Earth Science Practice Test - Question List

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81.
A main sequence star becomes a red giant when which of the following events occurs?
  1. The hydrogen in the star's core is used up.
  2. Expansion of the Core Causes It to Cool Down.
  3. The helium in the outer layers of the star begins to fuse.
  4. Combustion of gases on the star's surface causes it to expand.
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82.
When a star such as the Sun reaches a late stage of its life, it typically becomes a:
  1. Neutron star comprising the nuclei of fused iron and carbon atoms.
  2. White dwarf comprising mainly carbon and oxygen.
  3. Black hole produced by compression of the extremely dense core.
  4. Cepheid variable star produced by instability in the star's dying core.
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83.
Astronomers use which of the following properties of stars to plot them on the Hertzsprung- Russell diagram?
  1. Proximity to Earth and age.
  2. Lifecycle stage and spectral class.
  3. Temperature and luminosity.
  4. Size and composition.
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84.
Redshift for some galaxies is larger than for other galaxies in different parts of the universe. This difference shows that galaxies are:
  1. Concentrated in the region of space closest to Earth.
  2. Developing at different rates depending on how their mass is distributed.
  3. Clustered in different regions of space by their age.
  4. Receding from each other at different rates depending on how far away they are.
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85.
Astronomers have speculated about what creates different types of galaxies. The leading hypothesis is that the:
  1. Collision of disk-like, relatively small galaxies produces larger spiral and elliptical galaxies.
  2. Presence or absence of a black hole determines whether a galaxy will develop into an elliptical or spiral type of galaxy.
  3. Gravitational attraction of the matter in galaxies causes them to change type as they age.
  4. Abundance or scarcity of heavy elements determines whether elliptical or spiral galaxies will form from preexisting gas clouds.
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