Composition of the Universe

Which of the following best describes a star?  A star is a celestial body ---

• composed of rock and metal with a very high density

• that is too big to be an asteroid, but too small to be a planet.

• that rotates on an axis and revolves around the Sun

• composed of gases that emit light due to nuclear reactions

Which of the following best describes a nebula.  A nebula is

• a region in the solar system that is occupied by irregularly shaped bodies

• a large and icy celestial body with an irregular orbit around the Sun

• a natural satellite created by the collision of two large asteroids

• an interstellar cloud of dust, hydrogen, helium and other gases

Which of the following best describes a galaxy?  A galaxy is ---

• A particle of debris in the solar system that does not act as a satellite of any planet

• a visible body of liquid or frozen crystal droplets suspended above a planetary surface

• a massive system of stars, gas, dust and dark matter bound together by gravity.

• the visible path of a meteoroid as it enters Earth's atmosphere

An interstellar cloud of dust and gases that serves as a location for the formation of new stars is

• meteor

• planet

• galaxy

• nebula

Which of the following components of the universe is best described as a system of stars, gases, and dust held together by gravity.

• a nebula

• a planet

• a meteor

• a galaxy

Tags

NGSS.MS-ESS1-2

Which of the following components of the universe is best described as an interstellar cloud of dust and gases where stars are formed?

• a nebula

• a planet

• a meteor

• a galaxy

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

• A moon has less mass than a star and more mass than the planet it orbits.

• A planet has less mass than a galaxy and more mass than the star it orbits.

• A galaxy has less mass than a moon and more mass than a planet.

• A star has less mass than a galaxy and more mass than a planet.

Tags

NGSS.MS-ESS1-3

A large cloud of dust and gas

• black hole

• nebula

• Galaxy

• Supercluster

What type of galaxy is this?

• Spiral

• Elliptical

• Irregular

• Irrational

Tags

NGSS.MS-ESS1-2

A system of stars, gas, dust, and dark matter bound together by gravity is called -

• an asteroid

• a moon

• a galaxy

• a nebula

Tags

NGSS.MS-ESS1-2