36. What is a wormhole?
a) A theoretical passage through space-time that would allow travel between two points in space that are far apart
b) A type of black hole that emits large amounts of radiation
c) A type of galaxy that emits radio waves
d) A type of planet that emits radio waves
37. What is a red giant?
a) A large, cool star in the later stages of its life
b) A small, hot star in the early stages of its life
c) A type of black hole that emits large amounts of radiation
d) A type of planet that emits large amounts of radiation
38. What is dark matter?
a) Matter that emits no light or other electromagnetic radiation, and can only be detected by its gravitational effects
b) Matter that is extremely dense and emits high levels of radiation
c) Matter that is composed of antimatter particles
d) Matter that is found only in the outer reaches of the universe
39. What is a white dwarf?
a) A small, hot star that is the remnant of a larger star after it has exhausted its nuclear fuel
b) A large, cool star in the later stages of its life
c) A type of black hole that emits large amounts of radiation
d) A type of planet that emits large amounts of radiation
40. What is the Big Bang?
a) The event that created the universe, in which all matter and energy were concentrated in a single point that exploded and expanded rapidly
b) The event that created the first living organisms on Earth
c) The event that created the first stars in the universe
d) The event that caused the extinction of the dinosaurs
