Name: __________________________________ Date: ______________ Period: _______
Seeing Black Holes
1. What are black holes made of?
2. Why is it called a “black hole”?
3. Black holes are born when the ______________________________________________ burn off their
fuel and violently collapse.
4. Most of what we know about black holes has come from the (a)___________________, and the universe
they study is in their (b)__________________.
5. Einstein’s great insight was to realize that gravity is caused by the bending of…
6. Which of Einstein’s theories predicted the existence of black holes?
7. As you approach a black hole, what flows faster and faster?
8. At the center of a black hole, gravity becomes…
9. All the mass of a black hole in concentrated in a point that takes up how much space?
10. What is this point of infinite density and infinite gravity at the center of a black hole?
11. What was showing that very hot gas was flowing into something extremely massive and invisible?
12. How far did the star near the center of the Milky Way travel in just a year?
13. The invisible object in the center of the Milky Way is how much bigger than the Sun?
14. How big is the space this object occupies?
15. Could this black hole have formed from a single star?
16. What kind of black hole is it?
Supernovae and Black Holes
Name: __________________________________ Date: ______________ Period: _______
Seeing Black Holes
17. Astronomers believe that there are (a)________________________ of smaller, (b)__________________
black holes in the universe.
18. Every galaxy has got (a)_________ big black hole in the middle, and (b)_____________________ of
smaller black holes.
19. What theory is used to describe very small things like atoms?
20. In the quantum world, the mere act of _______________________ changes what you see.
21. What can quantum mechanics NOT describe?
22. What do you get when you try to get a quantum version of Einstein’s theory of relativity?
23. The singularity found at the center of every black hole, is the same impossible object found at the very
beginning of…
24. A black hole focuses the starlight from behind it into what?
Supernovae and Black Holes