Astronomy Test Review 21-22

Front

How do astronomers know about things in space that we can't get to?

Back

They look at the light they give off with a spectrograph.

Front

What does the Big Bang Theory explain?

Back

How our universe began

Front

Which is evidence that the universe is expanding?

Back

The galaxies are moving away from us.

Front

Light emitted from a star or galaxy can be separated into a band of colors, called a ________.

Back

Spectrum

Front

How does Cosmic Microwave Background Radiation support that the Big Bang theory happened?

Back

It is leftover radiation (heat) from the big bang, meaning the big bang was really hot and a picture of the universe in its early stages.

Front

Which elements are most abundant in the visible universe?

Back

Hydrogen and Helium

Front

As galaxies move away from our galaxy a shift on the electromagnetic spectrum (EMS) is noticed. This phenomena is called _____________.

Back

redshift

Front

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

Back

Hydrogen and helium observable amounts are the same as theoretical amounts.

Front

Red light has a ______ wavelength than the blue end.

Back

Longer

Front

What happened during the Big Bang?

Back

About 14 Billion years ago, an infinitesimally small, infinitely hot, infinitely dense, something expanded and cooled into our current state of the universe.