5.4 Vocab

Front

Absolute Zero

Back

The temperature at which all particle motion stops.

Front

Hubble’s Law

Back

The further away a galaxy is, the faster it is moving away.

Front

Singularity

Back

The point in the very early universe where everything was concentrated into an infinitely dense and small state.

Front

Dark Energy

Back

A theoretical force that counteracts gravity and causes the universe to expand at an accelerating rate.

Front

Big Bang Theory

Back

The idea that all matter and energy in the universe were concentrated in an infinitely small, dense space and then rapidly expanded.

Front

Inflation

Back

The rapid expansion of the universe in the first moments after the Big Bang.