18 questions
A system of stars, gas, dust, and dark matter bound together by gravity is called -
an asteroid
a moon
a galaxy
a nebula
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.
Elliptical, spiral, and irregular are all classifications of the overall shape of which of the following?
stars
galaxies
nebulae
comets
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.
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.
Stars are made mostly of which two elements?
hydrogen and helium
mercury and strontium
iron and potassium
krypton and bismuth
A system of stars, gas, dust, and dark matter bound together by gravity is called -
an asteroid
a nebula
a galaxy
a moon
A large celestial body made of gases that emits light due to nuclear reactions is called -
a galaxy
a nebula
a comet
a star
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.
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
Galaxies are classified by their shapes into all of the following types EXCEPT -
spiral galaxy
irregular galaxy
oblong galaxy
elliptical galaxy
The stars and all the other matter in a galaxy are held together by which of the following?
Dark matter
Inertia
Gravity
Magnetism
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