EARTH SCI. (Solar system & Earth's Subsystem) Flashcards
TRUE OR FALSE:
The universe as we currently know it compromises all the space and time, and all the matter and energy in it.
TRUE
TRUE OR FALSE:
The universe is at least 4.5- 4.6 billion years old.
FALSE
How old is the universe and solar system?
13.8 billion years and 4.5- 4.6 billion years
TRUE OR FALSE:
The solar system as part of the Milky Way is located at the outer limb of the galaxy.
TRUE
How many planets do we have? (not including the sun)
8
What are the 8 plantes?
MERCURY
VENUS
EARTH
MARS
JUPITER
SATURN
URANUS
NEPTUNE
TRUE OR FALSE:
The Universe is at least 13.8 billion of years old and the Earth/ Solar System at least 4.5-4.6 billions of years old.
TRUE
TRUE OR FALSE:
The Universe is at least 10.8 billion of years old and the Earth/ Solar System at least 4.5-4.6 billions of years old.
FALSE
TRUE OR FALSE:
Any explanation of the origin of the Universe should be consistent with all information about its
composition, structure, accelerating expansion, cosmic microwave background radiation among others.
TRUE
TRUE OR FALSE:
The universe as we currently know it comprises all space and time, and all matter & energy in it.
TRUE
It is made of ____% baryonic matter (“ordinary” matter consisting of protons, electrons, and neutrons: atoms, planets, stars, galaxies, nebulae, and other bodies),
__% cold dark matter (matter that
has gravity but does not emit light),
and ___% dark energy (a source of
anti- gravity)
4.6%
24%
71.4%
It is made of 4.6% __________ (“ordinary” matter consisting of protons, electrons, and neutrons: atoms, planets, stars, galaxies, nebulae, and other bodies)
baryonic matter
24% ___________ (matter that
has gravity but does not emit light)
cold dark matter
71.4% ___________ (a source of
anti- gravity)
Dark energy
____ ________can explain what may be holding galaxies together for the reason that the low total mass is insufficient for gravity alone to do so.
Dark matter
____ ______can explain the observed accelerating expansion of the universe
Dark energy
The three most abundant elements.
Hydrogen, helium, and lithium
The building block of galaxies born out of clouds of gas and dust in galaxies
Stars
______ ________ are like furnaces where elements are synthesized or combined/fused together.
Stellar interiors
Most stars such as the Sun belong to the so-called “__________________”
“main sequence stars.”
In the cores of such stars, hydrogen atoms are fused through ________ ________ to make ______ atoms.
thermonuclear reactions (to make) helium atoms
TRUE OR FALSE:
The remaining dust and gas may end up as they are or as planets, asteroids, or other bodies in the accompanying planetary system.
TRUE
In 1929, _____ ______ announced his significant discovery of the “redshift” and its interpretation that galaxies are moving away from each other, hence as evidence for an expanding universe, just as predicted by Einstein’s Theory of General Relativity.
Edwin Hubble
In 1929, Edwin Hubble announced his significant discovery of the “______” and its interpretation that galaxies are moving away from each other, hence as evidence for an expanding universe, just as predicted by Einstein’s Theory of General Relativity.
redshift