8.8A Components of the Universe PPP/TAG

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-ESS1-3

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

• an asteroid

• a galaxy

• a nebula

• a moon

Tags

NGSS.MS-ESS1-2

Stars are made mostly of which two elements?

• Selenium and sodium

• Astatine and arsenic

• Chlorine and cesium

• Hydrogen and helium

Tags

NGSS.HS-ESS1-3

A large celestial body made of gases that emits light due to nuclear reactions is called –

• a galaxy

• a nebula

• a comet

• a star

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

• a meteor

• a planet

• a galaxy

• a nebula

Galaxies are classified into all of the following types by their shapes EXCEPT -

• spiral

• elliptical

• lenticular

• crescent

Which of the following is an accurate description of the relationship between components of the universe?

• Stars always contain galaxies.

• Galaxies contain many stars.

• Stars contain several nebulae.

• Nebulae contain many galaxies.