Name: ________________________________
BLACK HOLES - SUMMARY QUESTIONS
Choose the best answer.
Date: _________________________
1. Black holes are extreme environments where the force of gravity is so great that not even __________ can escape.
a. heat
c. light
b. atoms
d. energy
2. Along with their high gravitation, the _____________ are extremely high.
e. diameters
g. radiation bands
f. densities
h. luminosities
3. The ________________ is the point of no return, where it is impossible to escape being swallowed.
a. gravitational limit
c. surface
b. upper atmosphere
d. event horizon
4. In the future much of the matter in the universe may be _____________ by black holes.
e. swallowed
g. burned up
f. irradiated
h. exploded
5. Many galaxies have a black hole at their _____________.
a. outer edges
b. center
c. horizon
d. gravitational source
6. Black holes produce jets of matter, called ____________, traveling at near the speed of light.
e. antimatter
g. cosmic rays
f. gamma particles
h. bright streamers
7. Some researchers are exploring the possibility of producing tiny black holes in _____________.
i. chemistry labs
k. observatories
j. particle accelerators
l. electron guns
8. Black holes create distortions in the fabric of _______________.
m. space-time
o. the universe
n. gravity
p. exoplanetary systems
9. Their lifetimes may be measurable in ______________.
q. light years
r. mega eras
s. trillions of years
t. googol-years
10. One theory (Hawking) postulates that the black holes of the far future may eventually _____________, scattering
their contents throughout the universe.
u. implode
w. explode
v. merge
x. collide
11. This will be the _______________.
a. ultimate end
b. beginning of a new universe
c. second big bang
d. end of the planets