1.2 Atomic Origins Part 1

The Big Bang Theory suggests that our universe formed as the result of a huge explosion that sent all existing matter flying outward from a single point. The Big Bang Theory is supported by which of these observations?

• All matter in the universe is composed of the same atoms.

• All galaxies appear to be moving away from all other galaxies.

• All stars in the universe are approximately the same age.

• The universe is relatively the same temperature in all locations.

The Big Bang Theory suggests that our universe originated hot long ago?

• 10 - 20 billion years ago

• 10 - 20 million years ago

• 10 - 20 thousand years ago

• 10 - 20 centuries ago

Cosmic Microwave Background Radiation (CMBR) is the term used to describe the residual microwave radiation observed everywhere in the universe that seems to have no single source. The observation of CMBR is used as evidence of The Big Bang Theory because it is believed to be -

• The result of collisions between neighboring galaxies.

• Particles of dust that have absorbed radioactivity.

• Radiation left over from the rapid expansion of matter.

• Light energy emitted from the source of The Big Bang.

A reaction in which two light nuclei combine to produce a nucleus of heavier mass, resulting in the release of a large amount of energy.

• Nuclear Bomb

• Nuclear Fusion

• Nuclear Fission

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

What does the Big Bang theory suggest?

• The universe was just there
• The Milky Way is the only solar system
• The universe is continually expanding
• The universe is collapsing in toward a single point

What were the original two elements in our universe?

• Lithium and Carbon
• Hydrogen and Neon
• Helium and Chlorine
• Hydrogen and Helium

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

As galaxies move away from our galaxy

a shift on the electromagnetic spectrum is noticed. This phenomena is

called _____________.

• redshift

• blueshift

Atoms of the same element which have a different number of neutrons are called _________________.

• ions

• isotopes

• quarks

• molecules