Stars and Galaxies

What type of explosion is thought to create black holes?

• Supernova explosion

• Nuclear explosion

• Chemical explosion

• Volcanic explosion

What is a supernova?

• A type of galaxy formation

• A powerful and luminous explosion of a star, marking the end of its life cycle.

• A black hole creation process

• A method of star formation

Which is the largest: molecule, moon, universe, or galaxy?

• molecule

• moon

• galaxy

• universe

What is the Big Bang Theory?

• A theory that explains the formation of black holes.

• The leading explanation about how the universe began, stating that it started from a singularity and has been expanding ever since.

• A hypothesis about the future of the universe's expansion.

• A model that describes the evolution of life on Earth.

What is a light-year?

• A unit of time measuring how long light travels.

• The distance that light travels in one Earth year.

• A measure of the speed of light in a vacuum.

• The time it takes for light to travel from the Sun to Earth.

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 that absorbs all matter.

What are the main components of a galaxy?

• Stars, planets, and moons

• Stars, stellar remnants, interstellar gas, dust, and dark matter

• Comets, asteroids, and meteoroids

• Black holes, quasars, and neutron stars

What is the difference between a comet and an asteroid?

• A comet is a small icy body that releases gases when close to the Sun, while an asteroid is a rocky body that orbits the Sun.

• A comet is a large rocky body that orbits the Sun, while an asteroid is a small icy body that releases gases.

• A comet is a celestial body that never comes close to the Sun, while an asteroid is always found in the asteroid belt.

• A comet is a type of star, while an asteroid is a planet.

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 massive celestial body that produces light and heat.

• A star is a massive celestial body that produces light and heat 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 small celestial body that does not produce light, while a planet is a massive body that emits light.

• A star and a planet are the same, both are celestial bodies that orbit each other.

What is the Milky Way?

• A type of star

• A galaxy that contains our Solar System

• A planet in our Solar System

• A black hole in the universe