Quiz on the Universe

According to the diagram, what significant event is marked at around 13.4 billion years ago?

• Formation of the first stars

• Discovery of radio waves

• Invention of the telescope

• The extinction of dinosaurs

According to the diagram, what appears to be the relationship between the redshift (z) of a galaxy and its age?

• Older galaxies have higher redshift.

• Younger galaxies have higher redshift.

• Redshift does not change with age.

• Older galaxies have lower redshift.

What did Edwin Hubble discover about the universe in the early 1920s?

• The universe is contracting

• The universe is static

• The universe is expanding

• The universe is infinite

What concept did Edwin Hubble's discovery eventually support?

• The Big Crunch theory

• The Steady State theory

• The Big Bang theory

• The Pulsating Universe theory

According to the text, what does redshift in distant galaxies indicate?

• That galaxies are moving towards us

• That galaxies are not moving

• That galaxies are moving away from us

• That galaxies are static in size

Which color of visible light has the longest wavelength?

• Red

• Blue

• Green

• Yellow

Which part of the electromagnetic spectrum is mostly invisible to human eyes?

• Visible light

• Ultraviolet rays

• Infrared rays

• Most of the spectrum

What can astronomers learn by analyzing the dark absorption lines in a star's spectrum?

• The star's exact age and future lifespan

• The composition of elements within the star

• The star's distance from Earth

• The direction of the star's movement

What phenomenon explains the shift of absorption lines toward the red end of the spectrum in distant galaxies?

• Blue shift

• Redshift

• Green shift

• Light bending

According to the Doppler Effect, what happens to sound waves as a sound-producing object moves away from you?

• They are squished together

• They change color

• They are stretched out

• They increase in speed