Earth and the Universe Flashcards
study of the earth, its composition, structure, history and the processes that shaped the earth of the past and those that would continue to mold the earth of the present.
Geology
examines the materials composing Earth and seeks to understand the many processes that operate beneath and upon its surface.
Physical Geology
understanding the origin of Earth and its development through time.
Historical Geology
The totality of space and time.
The Universe
An enormous collection of heavenly bodies held together by gravitational attraction.
Galaxies
The distance traveled by light in one year.
Light Year
What is the speed of light?
3x10^5 km/sec
a model for the evolution of the universe in which a incomprehensibly large explosion occur 13.787 (13.8) Billion years ago that sent all matters of the universe flying outward at incredible speed.
The Big Bang Theory
Who proposed an expanding model for the universe to explain the observed redshits of spiral nebulae and calculated the Hubble law.
Georges Lemaitre
According to modern cosmology, the universe has no ____?
edge and therefore no center
What was the first and second evidence of The Big Bang Theory
1st: The Universe was expanding (red shift)
2nd: permeated by background radiation
Who recognized the phenomenon that galaxies are moving away from each other at tremendous speeds.
Edwin Hubble
A change in the frequency of a sound, light, or other wave cause by the movement of the wave’s source relative to the observer.
Doppler Effect
What is the age of the Universe?
13.7 billion years old
Who made the second important observation that provided evidence of the Big Bang in 1965.
Arno Penzias and Robert Wilson
What was this background radiation mean as an evidence for the Big Bang Theory
the fading afterglow of the Big Bang
According to this theory, the universe will one day stop expanding. Then, as gravity pulls on the matter, the universe will begin to contract, falling inward until it has collapsed back into a super-hot, super-dense singularity.
The Big Crunch Theory
The Big Crunch Theory
