ESS Semester 1 Exam Review Part 1

Front

What process begins when a star is born?

Back

Nuclear fusion.

Front

What is the approximate surface temperature of the Sun?

Back

5,500 °C.

Front

What does Hubble's Law state about the universe?

Back

The universe is constantly expanding.

Front

What color are the hottest stars?

Back

Blue.

Front

What property of a star determines its evolution?

Back

Mass.

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 a star's mass?

Back

It determines the star's lifecycle and evolution.

Front

What is the main component of the Sun?

Back

Hydrogen.

Front

What is the life cycle of a star?

Back

A sequence of stages a star goes through from formation to death, including main sequence, red giant, and supernova.

Front

What is a supernova?

Back

A powerful and luminous explosion of a star at the end of its life cycle.