Cosmology Review Part 1

According to the Big Bang theory, when did the universe begin expanding?

• 4.5 billion years ago

• 13.8 billion years ago

• 100 million years ago

• 1 trillion years ago

What is key evidence for the Big Bang theory?

• Black holes

• Cosmic microwave background radiation

• Asteroids

• Star colors

The redshift of distant galaxies shows the universe is ________.

• expanding

• shrinking

• stationary

• cooling

The universe is expanding, as shown by galaxies moving away from us, which is measured by their ________.

• redshift

• luminosity

• mass

• rotation speed

Scientific evidence suggests the universe is about ________ years old.

• 13.8 billion

• 4.5 billion

• 100 million

• 50 billion

One major evidence for the Big Bang is the presence of ________, which is uniform across the sky.

• cosmic microwave background radiation

• solar wind

• gamma ray bursts

• planetary nebulae

The abundance of which two light elements in the universe matches Big Bang nucleosynthesis predictions?

• hydrogen, helium

• carbon, oxygen

• lithium, beryllium

• neon, argon

Redshift observations of galaxies show that ________.

• galaxies are moving away from us, so the universe is expanding

• galaxies are moving towards us, so the universe is contracting

• the universe is unchanging

• galaxies are not moving relative to each other

The Solar Nebular Theory describes how stars and planets form from a rotating disk of gas and dust.

• True

• False

Which theory explains how material gathers around a forming star to create planets?

• Solar Nebular Theory

• Steady State Theory

• Stellar Collision Theory

• Big Bang Theory