ESS Final ( Practice Test V)

Front

Where is our sun positioned in the Milky Way?

Back

Within one of the spirals.

Front

What remains after a low-mass or medium-mass star dies?

Back

A white dwarf.

Front

What color will a star be with a surface temperature of 5000–6000 K?

Back

Yellow.

Front

When is a star thought to be born?

Back

When a protostar reaches a temperature high enough for nuclear fusion to begin.

Front

What is supportive evidence of the big bang theory?

Back

Cosmic microwave background radiation.

Front

What is a nebula?

Back

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

Front

What is a black hole?

Back

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

Front

What is a neutron star?

Back

A type of stellar remnant that is incredibly dense, formed from the remnants of a supernova explosion.

Front

What is nuclear fusion?

Back

The process by which two light atomic nuclei combine to form a heavier nucleus, releasing energy.

Front

What is the significance of cosmic microwave background radiation?

Back

It is the afterglow radiation from the Big Bang, providing evidence for the origin of the universe.