All About Black Holes: teacher key

Black Holes, grade 3 edition, written for 3rd grade. A black hole is a place in space where gravity is so strong that even light cannot get out. See how black holes form, grow and look in pictures.

Read the book. Print this page for the key.

Questions and answers

1. What is the edge of a black hole called?
   • The singularity
   • The Sun
   • The event horizon (answer)
2. What shape did the first picture of a black hole show?
   • A cube
   • A bright ring with a dark spot (answer)
   • A star
3. Black hole A crashes into a star. Black hole B crashes into nothing. Which one can get bigger?
   • Neither
   • B
   • A (answer)
4. Scientists showed the first picture of a black hole in 2019. They showed the picture of our galaxy's black hole in 2022. How many years later was that?
   • 30 years
   • 3 years (answer)
   • 10 years
5. What does evaporate mean?
   • Grow bigger
   • Shrink away (answer)
   • Spin fast

Words

• singularity: center point
• evaporate: shrink away
• supermassive: biggest black holes