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WorksheetsUnit 6 Lesson 2
Total questions: 20
Worksheet time: 10mins
Cosmic microwave background (CMB)
is an electromagnetic radiation that reaches Earth from every direction in space
will be a radiowave in the future
is a result of EMR shrinking
originates from the center of the galaxy
Cosmic Microwave Background has:
a temperature of 3 K
no temperature
changing temperature
temperature which cannot be measured
Cosmic Microwave Background
is evidence in support of the Big Bang theory
is evidence in support of the expanding universe
is evidence in support of the steady state theory
is evidence in support of EMR
Which theory describes an infinite universe?
Static Theory
Steady State Theory
Big Bang Theory
"The universe exists now as it always has" is a view of the
Static Theory
Steady State Theory
Big Bang Theory
"The formation of matter is at a rate that maintains a steady density as the universe expands" is the
Static Theory
Steady State Theory
Big Bang Theory
"All matter and energy in the universe was once extremely compressed and then expanded suddenly in all directions." is the
Static Theory
Steady State Theory
Big Bang Theory
In a steady state universe:
changes would occur uniformly through space and time
young and old matter would be mixed together
distant galaxies would appear younger
there would be no changes
According to the big bang theory:
CMB first appeared when protons, neutrons and electrons appeared
CMB first appeared when space becomes transparent
CMB first appeared when supernovae appeared
CMB first appeared when the universe was 380,000 years old
At about 380,000 years after the big bang:
space became transparent
neutral atoms formed
protons and neutrons combined
light was a microwave
All points in space expand at the same rate.
true
false
The point closest to the observer will show
the biggest redshift
the smallest redshift
that its moving away at the slowest velocity
that its moving away at the fastest velocity
The rubber band lab showed the following:
All points expand at the same velocity
All points expand at different velocities
All points maintain relative equal distances from each other
All points have constant velocity
What is the correct order of matter formation?
plasma, stable helium nuclei, complex molecules
heavier elements, stable helium nuclei formation, plasma
stable helium nuclei, neutral hydrogen atoms, heavier elements
plasma, heavier elements, neutral hydrogen atoms
Which of these observations is explained by the big bang theory?
the CMB matching temp of 3000 Kelvin
mutual attraction of matter by gravity
red shift of radiation from distant galaxies
the dark night sky
Which of these observations is explained by the big bang theory?
the CMB matching temp of 3 Kelvin
lack of radiation older than CMB
blue shift of Andromeda (nearby galaxy)
composition of the universe: 75% H and 25% He
Why did the universe become transparent?
It cooled to the point that atoms could form
Protons and neutrons were no longer able to absorb photons
Electrons in atoms only react with photons of specific frequencies
Light could not exist until the density of the universe decreased through expansion
The big bang was NOT an explosion because
Matter expanded in one direction
Matter expanded in all directions
Matter expanded at a steady rate
Matter expanded too slowly
The 3:1 Hydrogen to Helium ratio
supports the expansion of the universe
supports the big bang theory only
supports steady state and big bang
supports static theory
The 3:1 Hydrogen to Helium ratio
shows the temperature at 380,000 years after big bang
shows the rate of expansion at 380,000 years after big bang
shows the CMB at 380,000 years after the big bang
shows the frequency of light at 380,000 years after the big bang
