24-25 Unit 2 E&S Exam Study Guide

Front

The Universe is comprised of 25% _____________________.

Back

Helium

Front

Why won't our sun ever become a black hole?

Back

It is too small.

Front

Which theory suggests that the universe is constantly expanding?

Back

Hubble's Law.

Front

What happens to the wavelengths of energy if they are moving AWAY from a source?

Back

The waves stretch out and get longer.

Front

What is the speed of light?

Back

300,000 km/s.

Front

What is the primary component of the universe?

Back

Hydrogen.

Front

What is the Big Bang Theory?

Back

A theory that describes the origin of the universe as a massive explosion that occurred approximately 13.8 billion years ago.

Front

What is Hubble's Law?

Back

A law that states that the farther away a galaxy is, the faster it is moving away from us.

Front

What is redshift?

Back

The phenomenon where light from an object moving away from an observer is shifted to longer wavelengths.

Front

What is a black hole?

Back

A region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.