Composition of the Universe

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

Which of the following describes a nebula?

• A cloud of gas and dust where new stars form

• An oval-shaped cluster of densely packed stars

• An explosion at the end of a giant star’s life

• A star and all the planets that revolve around it

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

Elliptical, spiral, and irregular are all classifications of the overall shape of which of the following?

• stars

• galaxies

• nebulae

• comets

Tags

NGSS.MS-ESS1-2

A spiral galaxy is best described as an extremely large group of stars -

• arranged in arms encircling a dense center.

• all packed into a spherical, dense center.

• arranged in the shape of a flattened ball.

• and gases arranged in no specific shape.

Tags

NGSS.MS-ESS1-2

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.

Tags

NGSS.MS-ESS1-2

Stars are made mostly of which two elements?

• hydrogen and helium

• mercury and strontium

• iron and potassium

• krypton and bismuth

Tags

NGSS.HS-ESS1-1

NGSS.HS-ESS1-3

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

• an asteroid

• a nebula

• a galaxy

• a moon

Tags

NGSS.MS-ESS1-2