MCG Test Quizzes with Complete Solutions
A "good" scientific model
a representation of a natural phenomenon or natural process that is consistent with observations
our sun is a star that is
of average size and temperature compared to other stars
the age of the universe is closest to
14 billion years
stars form when
large interstellar gas clouds collapse under the force of gravity
The Cavendish apparatus is used to
measure the strength of the gravitational force
According to the Big Bang theory, the universe began as a tiny point that contained all
space, time, energy, and matter. One observation that leads scientists to this conclusion is
distant galaxies are moving away from us in all directions
Evolution
any change of the observable physical characteristics of an object over time
planets in our solar system (all solar systems in fact) formed from
the same interstellar cloud as their star formed from, but after the star formed
Bill Bryson, the author of our book for this course, is a
, professional writer
one astronomical unit (AU) is equivalent to about 93 miles. The astronomical unit is
the distance the sun to the earth
Reverend Evans looks for supernovae and he's really good at finding them. The typed of
supernovae he often finds are important to our understanding of the universe because
their apparent brightness can be used to determine the distances to their host galaxies
What is NOT an example of a possible direct measurement of objects outside of our solar
system?
apparent distance
Nucleosynthesis is a word that describes the process of making heavy elements by fusing
the nuclei of lighter elements together (nuclear fusion reactions). The chemical elements
listed in the periodic table that are heavier than hydrogen, helium and lithium were formed
in
both the cores of stares and supernova explosions
The chemical elements formed in the Big Bang were
hydrogen and helium
The various European groups and individuals we read about who determined size and
mass of the earth in the 18th century spent fortunes and years in their efforts to make the
necessary measurements. Why was it so important to them to precisely measure the
properties of the earth?
A "good" scientific model
a representation of a natural phenomenon or natural process that is consistent with observations
our sun is a star that is
of average size and temperature compared to other stars
the age of the universe is closest to
14 billion years
stars form when
large interstellar gas clouds collapse under the force of gravity
The Cavendish apparatus is used to
measure the strength of the gravitational force
According to the Big Bang theory, the universe began as a tiny point that contained all
space, time, energy, and matter. One observation that leads scientists to this conclusion is
distant galaxies are moving away from us in all directions
Evolution
any change of the observable physical characteristics of an object over time
planets in our solar system (all solar systems in fact) formed from
the same interstellar cloud as their star formed from, but after the star formed
Bill Bryson, the author of our book for this course, is a
, professional writer
one astronomical unit (AU) is equivalent to about 93 miles. The astronomical unit is
the distance the sun to the earth
Reverend Evans looks for supernovae and he's really good at finding them. The typed of
supernovae he often finds are important to our understanding of the universe because
their apparent brightness can be used to determine the distances to their host galaxies
What is NOT an example of a possible direct measurement of objects outside of our solar
system?
apparent distance
Nucleosynthesis is a word that describes the process of making heavy elements by fusing
the nuclei of lighter elements together (nuclear fusion reactions). The chemical elements
listed in the periodic table that are heavier than hydrogen, helium and lithium were formed
in
both the cores of stares and supernova explosions
The chemical elements formed in the Big Bang were
hydrogen and helium
The various European groups and individuals we read about who determined size and
mass of the earth in the 18th century spent fortunes and years in their efforts to make the
necessary measurements. Why was it so important to them to precisely measure the
properties of the earth?
