26.5 The Expanding Universe

The initial explosion that resulted in the formation and expansion of the universe is called __________________.

• the Big Bang

• the start of the universe

• the beginning

• the formation of space

Hubble's law states which of the following?

• We live in an expanding universe
• The further away a galaxy is, the faster it is receding
• Galaxies far away look redder through a telescope
• All of these

a theory that the universe formed in a huge explosion

• big bang

• planetesimal

• solar nebula

• dark energy

The farther away galaxies are from us, the _______________ it is that they moving away from us.

• more uncertain

• slower

• faster

• more unpredictable

In which direction are nearly all galaxies moving?

• toward each other

• away from each other

• colliding into one another

• in the direction of Earth

Hubble's Law states that the farther away galaxies are from us, the _______________ it is that they moving away from us.

• more uncertain

• slower

• faster

• more unpredictable

leftover thermal energy from the big bang

• solar nebula

• cosmic background radiation

• planetesimal

• dark matter

a force that is causing the expansion of the universe to accelerate

• dark energy

• the big bang

• planetesimals

• solar nebula

matter that does not give off electromagnetic radiation

• solar nebula

• big bang

• dark matter

• dark energy

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