BIg Bang Astronomy Practice

time, everything

14 billion years ago, the big bang created _______ and space, our whole vast universe, and _________ in it.

5

About ___ billion years ago, gravity begins to draw in dust and gas to give birth to our sun and solar system.

opposite (negative)

Antimatter has the _________ charge from regular matter.

hydrogen, helium, lithium

As temperatures of the universe cool, the particles begin bonding together to form atoms of elements. The first to form is ___________, then ___________ and ___________.

static, eternal

At the beginning of the 20th century, the conventional widsom in science was that the universe was _______ and _______.

380,000

Before the universe became transparent, it was a milky soup of lose electrons. It took ___________ years for the electrons to form atoms in the early universe.

particles

Early in the universe there were no atoms, but there were tiny, subatomic _________.

away, speeds

Edwin Hubble (1929) discovered that galaxies are moving __________ from Earth at incredible _________. This is the first real evidence of the big bang.

first seconds

Everything in the universe is made from the matter created in the ______________ of the Big Bang.

nothing

Everything that matters to us today could have risen out of ___________.

billion and one

For every billion particles of antimatter, there were a ___________ particles of matter. That was enough to build the universe.

twice

Galaxies that are twice as far away are moving ________ as fast. This became known as Hubble's Law.

4.5 billion years ago

How long ago did our solar system begin forming?

black holes

If gravity were weaker than it is, everything would fall apart and no galaxies could form. If gravity were stronger than it is, everything would end up in _________.

expanded

Immediately after the big bang, a shockwave of energy _________ the universe in a fraction of a second (this is the "inflation")

galaxy

One billion years after the big bang, the first ________ forms.

infinite number

Our big bang is just one of the many big bangs in an ___________ of universes.

accelerates

Our universe is not slowing down, but it is actually speeding up as it _________.

150

Space is at least ___ billion light years across.

disintegrate

Temperatures during the big bang were so hot that the atoms of your body would _________.

infinite, temperature

The beginning of everything was a single point of _________ density and infinite _________ in a region smaller than a single atom... a point of raging energy.

gravity

The first force to emerge from the big bang was _________.

13.7

The universe approximately is __________ billion years old.

E=mc^2

What equation shows that we can get matter out of energy in the universe?

antimatter

What is the one thing that can destroy a universe before it even gets started?

another big bang

What might happen if our universe DOES collapse back on itself?

dark

________ energy is pushing the galaxies apart and is killing the universe.