Where Light Cannot Escape: teacher key

Black Holes, grade 6 edition, written for 6th grade. A black hole is a place in space that light cannot leave. Read how black holes form, how we find them and what the first pictures show.

Read the book. Print this page for the key.

Questions and answers

1. What is the edge of a black hole called?
   • The event horizon (answer)
   • The supernova
   • The shadow
2. When did scientists show the first picture of a black hole?
   • In 2015
   • In 2019 (answer)
   • In 2022
3. Which has more mass, Sagittarius A* or the black hole in galaxy M87?
   • Sagittarius A*
   • The black hole in galaxy M87 (answer)
   • They have the same mass
4. Why can we not see a black hole?
   • It hides behind stars
   • It is too small for telescopes
   • No light comes out of it (answer)
5. What does merging mean in "merging with other black holes"?
   • Joining together (answer)
   • Spinning fast
   • Getting hot

Words

• horizon: edge
• supermassive: very big
• merging: joining together
• evaporate: slowly vanish
• gravity: pulling force