Return to Book List
Grade 6
Topic Cloze Quiz
Type your name:
Galaxies and Beyond
A quasar is a high-energy
source
spectrum
stars
black holes
Select your answer
that is extremely bright and extremely distant. Quasars are approximately the same
stars
size
energy
old
Select your answer
as the solar system. Their light must travel
black holes
billions
stars
spectrum
Select your answer
of years to reach Earth. That means quasars are extremely
billions
old
stars
size
Select your answer
. The wavelength of light coming from quasars has been transferred to the red end of the
source
energy
spectrum
size
Select your answer
. Quasars might be galaxies in a(n)
collide
old
infant
Hubble
Select your answer
stage. Many astronomers believe that when galaxies
collide
source
spectrum
size
Select your answer
they could feed material to supermassive
spectrum
black holes
stars
energy
Select your answer
. These black holes would feast on entire
spectrum
stars
energy
source
Select your answer
. This would release enormous amounts of
energy
billions
stars
black holes
Select your answer
. Some photographs from the
Hubble
source
infant
old
Select your answer
telescope support this hypothesis.