Unit 5: Universe Review

Front

What is the primary characteristic used to classify galaxies?

Back

Shape.

Front

What describes area B if it is brighter and cooler?

Back

Brighter and Cooler.

Front

How does the abundance of hydrogen and helium support the Big Bang Theory?

Back

Hydrogen and helium are in the same ratio throughout the universe.

Front

Which spectral class does our star, the sun, belong to?

Back

G.

Front

How does Cosmic Microwave Background Radiation support the Big Bang Theory?

Back

Microwaves are found everywhere in the universe.

Front

What are the three main types of galaxies?

Back

Spiral, Elliptical, and Irregular.

Front

What is the Big Bang Theory?

Back

A scientific explanation for the origin of the universe, stating it began from a singular point and has been expanding ever since.

Front

What is Cosmic Microwave Background Radiation?

Back

Radiation that fills the universe and is a remnant from the Big Bang.

Front

What is a galaxy?

Back

A massive system that consists of stars, stellar remnants, interstellar gas, dust, and dark matter.

Front

What is the difference between a star and a planet?

Back

A star generates its own light through nuclear fusion, while a planet does not.