Which statement defines a Star?

• A ball of hot gas that gives off light and heat

• A round object that orbits a planet

What is a Nebula?

• A place where new stars are born or where old stars have exploded

• A type of star

What is a Solar System?

• A group of galaxies

• The Sun and all objects that orbit around it

Which of the following best describes a Planet?

• A large, round object that orbits a star and reflects light

• A big ball of hot gas that gives off light

What does Geocentric refer to?

• A model of the solar system with the Sun at the center

• An old model that believed Earth was at the center

What is a Supernova?

• A type of planet

• A huge explosion at the end of a star's life

What does Heliocentric mean?

• A model of the solar system with the Sun at the center

• A model where Earth is at the center

What is Nuclear Fusion?

• A way to measure distance in space

• The process inside stars where smaller particles combine to make larger ones

What is a Light-year?

• A way to measure distance in space

• A unit of time

What defines a Galaxy?

• A model that places Earth at the center

• A huge group of stars, gas, and dust held together by gravity