CFA #1

Multiple Choice

Which of the following lists places a galaxy, a solar system, and the universe in order from smallest to largest?

• Galaxy, solar system, universe

• Universe, galaxy, solar system

• Solar system, galaxy, universe

• Universe, solar system, galaxy

Multiple Choice

Which of these correctly compares the masses of different components in the universe?

• A moon has less mass than star but more mass than a planet

• A star has more mass than a solar system but less than a galaxy

• A nebulae has more mass than a solar system but less mass than galaxy

• A galaxy has more mass than a solar system but less mass than nebula

Multiple Choice

What statement about the Sun is correct?

• The Sun is a star in our solar system that orbits a planet

• The Sun contains a nuclear reaction at its core

• The brightest and hottest star in the entire universe is the Sun

• The Sun has more mass than the Milky Way galaxy

Multiple Choice

The Milky Way galaxy is described as a disk of stars orbiting a central point. Which of these best explains why people on earth cannot see the entire shape of the Milky Way galaxy?

• Earth is a part of this galaxy

• Many more stars exist outside this galaxy

• The stars in the center of the galaxy are extremely small

• The center of the galaxy consists of a dense cluster of stars

Multiple Choice

Most stars fit into 1 of 4 groups on the HR Diagram. Which are of the diagram represents the Super Giants?

• Area M

• Area X

• Area Z

• Area P

Multiple Choice

The spectral classes of 4 stars are shown below. A star that is several thousand times less bright than the sun with a temperature above 10,000K would be classified as--

• A main sequence star in spectral class M

• A super giant in spectral class K

• A main sequence star in spectral class O

• A white dwarf in spectral class B

Multiple Choice

Based on this diagram, the sun is location 1.

• True

• False

Multiple Choice

Based on this diagram, which type of stars would belong to spectral class K and have the highest luminosity?

• White Dwarfs

• Main Sequence

• Giants

• Super Giants

Multiple Choice

With the use of the Hubble Space Telescope, scientists recently discovered a giant runaway star. It is ninety times larger than the Sun and much hotter. Why does the Sun appear to brighter than this runaway star when viewed from Earth?

• The Sun is a different color than the runaway star

• The Sun is older in its lifespan than the runaway star

• The Sun is closer to Earth than the runaway star

• The Sun is made of different elements than the runaway star

Multiple Choice

Quasars are extremely distant celestial bodies. Investigators using a special telescope determined that a certain quasar was emitting waves with a frequency of 1.4X10^(17). The investigators were most likely using a telescope that detected--

• Microwaves

• Visible Light

• X-Rays

• Gamma Rays