Unit 5: The Universe

Front

What is a supergiant star?

Back

A supergiant star is a high-mass star that has expanded and cooled after exhausting its nuclear fuel, leading to a large size and brightness.

Front

What happens to a supergiant star at the end of its life cycle?

Back

It explodes in a supernova due to its increase in mass and loss of pressure.

Front

What is a supernova?

Back

A supernova is the explosive death of a massive star, resulting from the collapse of its core.

Front

What is a nebula?

Back

A nebula is a collection of dust and gas in space that can form stars or is the remnant of dying stars.

Front

What is the relationship between a nebula and star formation?

Back

Nebulae are the regions where stars are born, as they contain the necessary materials (dust and gas) for star formation.

Front

How do astronomers determine the temperature of stars?

Back

Astronomers determine the temperature of stars by analyzing their colors; cooler stars appear red, while hotter stars appear blue.

Front

What is the correct order of star colors from coolest to hottest?

Back

Red, yellow, white, blue.

Front

What is a galaxy?

Back

A galaxy is a large collection of stars, gas, and dust held together by gravity.

Front

What force is responsible for holding stars, gas, and dust together in a galaxy?

Back

Gravity.

Front

What is the Milky Way?

Back

The Milky Way is the galaxy that contains our solar system, consisting of billions of stars.