Stars Nebulae and Galaxies

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

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

• a galaxy

• a nebula

• a comet

• a star

A characteristic of a nebula is that it -

• is at the center of the solar system.

• is a region where stars are born.

• forms halfway through a star’s life cycle.

• has the coolest temperature in space.

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

• a nebula

• a planet

• a meteor

• a galaxy

Tags

NGSS.MS-ESS1-2

The stars and all the other matter in a galaxy are held together by which of the following?

• Dark matter

• Inertia

• Gravity

• Magnetism

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

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

• a nebula

• a planet

• a meteor

• a galaxy

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

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

• spiral

• elliptical

• lenticular

• crescent

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

• spiral galaxy

• irregular galaxy

• oblong galaxy

• elliptical galaxy

What type of galaxy is this?

• Spiral

• Elliptical

• Irregular 

• Irrational