Black Holes

Which statement about black holes is NOT true?

• They are black because light cannot escape their gravity.

• Anything that enters a black hole is lost forever.

• Black holes gain weight by eating stars and planets.

• The black hole at the center of our galaxy weighs as much as 100 million suns.

Where would be the best place in paragraph 2 (lines 11-18) to insert this sentence?

It will die in about five billion years.

• before the first sentence

• after the first sentence

• after the second sentence

• after the fourth sentence

Will there ever be a black hole in our solar system?

• Yes. Every star eventually becomes a black hole.

• Perhaps, but not for another 5 billion years.

• Perhaps, but only if our sun collapses.

• No. Our sun is too small.

What caused people in the scientific community to start to think about black holes in a new way?

• Albert Einstein presented his theory of relativity.

• New telescopes began to be widely used.

• Astronauts in the 1960s brought back new information.

• Advances in physics proved black holes existed.

Which statement is a theory, not a proven fact?

• Black holes are extremely common.

• There are more than 100 billion galaxies in the universe.

• The black hole in our galaxy is pulling a gas cloud towards itself.

• Our universe is the product of a black hole in another, older universe.

Why does the author say no one will ever see a black hole?

• Because they probably don't exist.

• Because they are invisible.

• Because they are too far away.

• Because no telescope is strong enough.

Which of the following does the writer NOT use to describe the life cycle of a star or black hole?

• become born

• eat

• marry

• die