CBA 3 Review- Stars, Galaxies, Origins of the Universe

What are the spiral arms of a galaxy?

• The elongated and curved sections that are connected to the center of a spiral galaxy.

• The regions of a galaxy where stars are born.

• The dark matter that surrounds a galaxy.

• The areas of a galaxy that contain supermassive black holes.

What is a black hole?

• A region of space where the gravitational pull is so strong that nothing, not even light, can escape from it.

• A massive star that has exploded in a supernova.

• A type of celestial body that emits light and heat.

• A vacuum in space with no matter or energy.

What is luminosity?

• Luminosity is the total amount of energy emitted by a star per unit of time.

• Luminosity is the brightness of a star as seen from Earth.

• Luminosity is the distance of a star from Earth.

• Luminosity is the temperature of a star's surface.

What is the difference between a star and a planet?

• A star is a celestial body that orbits a planet, while a planet is a luminous celestial body made of gas.

• A star is a luminous celestial body made of plasma that generates energy through nuclear fusion, while a planet is a celestial body that orbits a star and does not produce its own light.

• A star is a type of planet that has a solid surface, while a planet is a gaseous body that emits light.

• A star is a celestial body that does not orbit anything, while a planet is a luminous body that generates energy.

What are the axes of the Hertzsprung Russell Diagram?

• Luminosity and Temperature

• Mass and Radius

• Color and Brightness

• Distance and Size

What is the role of gravity in the formation of stars?

• Gravity pushes gas and dust away from each other.

• Gravity pulls together gas and dust in space to form stars.

• Gravity has no effect on the formation of stars.

• Gravity only affects stars after they have formed.

What is the Big Bang Theory?

• A theory that suggests the universe is static and unchanging.

• The leading explanation for the origin of the universe, stating that it began as a singularity and has been expanding ever since.

• A hypothesis that the universe will eventually collapse back into a singularity.

• An idea that the universe is infinite and has no beginning or end.

What is the temperature of a star related to?

• Its mass and size

• Its color and stage in the stellar life cycle

• The distance from Earth

• The age of the universe

What is a nebula?

• A giant cloud of dust and gas in space, often the birthplace of stars.

• A type of star that is nearing the end of its life cycle.

• A planet that orbits a star in a solar system.

• A small, rocky body that orbits a planet.

What determines what a star will become?

• The mass of the star.

• The color of the star.

• The distance from Earth.

• The age of the star.