Structure of the Universe Flashcard #2 Review

Front

What are the outer planets primarily made of?

Back

The outer planets are primarily made of gases.

Front

Which planet is closest to the sun?

Back

Mercury is the planet closest to the sun.

Front

What type of star is extremely hot, small, dense, and dim?

Back

A white dwarf is extremely hot, small, dense, and dim.

Front

What type of star is very old?

Back

A red giant is a type of star that is very old.

Front

What process provides the energy for stars?

Back

Fusion is the process that provides energy for stars.

Front

Name the four outer planets in our solar system.

Back

The four outer planets are Jupiter, Saturn, Uranus, and Neptune.

Front

What is the main characteristic of a red giant star?

Back

A red giant star is characterized by its large size and cool temperature.

Front

What is the difference between a main sequence star and a supergiant?

Back

A main sequence star is in a stable phase of fusion, while a supergiant is much larger and has a shorter lifespan.

Front

What is the primary component of the sun?

Back

The primary component of the sun is hydrogen.

Front

What is the significance of the Hertzsprung-Russell diagram?

Back

The Hertzsprung-Russell diagram classifies stars based on their luminosity and temperature.