Flashcard: Escaping a Black Hole

Front

What is gravity?

Back

Gravity is a force that attracts two bodies towards each other, depending on their masses and the distance between them.

Front

How does the Moon's gravitational field compare to Earth's?

Back

The Moon's gravitational field is weaker than Earth's.

Front

Are black holes real?

Back

Yes, black holes are real astronomical objects, not just science fiction.

Front

What causes astronauts to appear to 'bounce' on the Moon?

Back

Astronauts appear to 'bounce' on the Moon because the Moon's gravitational field is weaker than Earth's.

Front

What two factors determine the strength of a gravitational field?

Back

The strength of a gravitational field is determined by mass and distance.

Front

What happens to gravity as the distance between two objects increases?

Back

As the distance between two objects increases, the gravitational force between them decreases.

Front

What is the relationship between mass and gravity?

Back

The greater the mass of an object, the stronger its gravitational pull.

Front

Can gravity be felt in space?

Back

Yes, gravity can be felt in space; it is what keeps planets in orbit around stars.

Front

What is a black hole?

Back

A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

Front

What is the event horizon of a black hole?

Back

The event horizon is the boundary around a black hole beyond which no information or matter can escape.