Introduction to Astronomy - Final Exam (Part 1: Multiple Choice)

Which observational technique would be MOST effective for studying the internal structure of a star?

• Optical photometry

• Helioseismology

• Radio interferometry

• X-ray imaging

The cosmic microwave background radiation provides evidence for which aspect of Big Bang cosmology?

• The formation of the first galaxies

• The decoupling of matter and radiation

• The onset of dark energy acceleration

• The formation of the first stars

Tags

NGSS.HS-ESS1-2

A star with a surface temperature of 3,000 K and high luminosity would be classified as:

• Main sequence star

• White dwarf

• Red giant

• Blue supergiant

Which galaxy type is most likely to contain active star formation regions?

• A) Elliptical galaxies

• B) Irregular galaxies

• C) S0 (lenticular) galaxies

• D) Dwarf elliptical galaxies

The precession of Earth's rotational axis occurs over approximately:

• 24 hours

• 1 year

• 26,000 years

• 100,000 years

Which atmospheric phenomenon makes Venus hotter than Mercury despite being farther from the Sun?

• Magnetic field interactions

• Tidal heating

• Runaway greenhouse effect

• Radioactive decay

Current models suggest the universe will ultimately:

• Collapse in a Big Crunch

• Expand forever and cool

• Reach a steady state

• Oscillate between expansion and contraction

During Big Bang nucleosynthesis, which elements were primarily formed?

• Hydrogen and helium only

• Hydrogen, helium, and lithium

• All elements up to iron

• All naturally occurring elements

Tags

NGSS.HS-ESS1-2

A parsec is defined as:

• The distance light travels in one year

• The distance at which one AU subtends an angle of one arcsecond

• The average distance between stars in the galaxy

• The radius of Earth's orbit around the Sun

The event horizon of a black hole represents:

• The distance at which time stops

• The boundary where escape velocity equals the speed of light

• The location of maximum gravitational acceleration

• The distance at which tidal forces become infinite