Front

Which statement is true? Options: The galaxies are moving toward us. The galaxies are moving away from us. The universe remains static or unchanged in motion. None of the above

Back

The galaxies are moving away from us.

Front

Which elements are most abundant in the visible universe?

Back

Hydrogen and Helium

Front

Galaxies that are redshifted are:

Back

moving away from us.

Front

The universe is expanding! This means that: all of the galaxies are spreading out., the universe must have started from a single point., the universe is cooling down., all of the above.

Back

all of the above.

Front

The Cosmic Background Radiation is:

Back

the remaining energy from the big bang.

Front

Light waves that are stretched out by objects moving apart:

Back

appear more red.

Front

The universe is ____________ years old.

Back

13.7 billion

Front

If a star is being observed from Earth and its light has shifted towards the blue side of the electromagnetic spectrum it would be...

Back

Moving towards the Earth

Front

Most scientists believe the Big Bang Theory explains which of the following questions? How our planets and moons formed, How our universe began, How the sun turns hydrogen into helium, How fast light travels through space

Back

How our universe began

Front

An infinitely small, infinitely dense, and infinitely hot point that is believed to have existed before the big bang.

Back

Singularity