Quiz # 2 Review

The __________ has planets, moons, comets, and asteroids.

• solar system
• earth
• rotation
• United States

As part of the Big Bang Theory of the formation of the universe, scientists believe that over time, the universe is continually changing in what characteristic?

• From more dense to less dense

• From rotating to stationary

• From cooler to hotter

• From very large to very small

The theory of the origin of the universe that is most popular among space scientists suggests that our universe originated how long ago?

• 10 – 20 centuries ago

• 10 – 20 thousand years ago

• 10 – 20 million years ago

• 10 – 20 billion years ago

What were the original two elements in our universe?

• Hydrogen and Lithium

• Helium and Oxygen

• Helium and Hydrogen

• None of the above

Space and all the matter & energy in it

• Space

• Universe

• Earth

• Milky Way

What is the big bang theory?

• A theory that states that the universe started in a large mass and then imploded to form everything.

• A theory that states that the universe was there, will be and is there. Is homogeneous and isotropic.

• A theory that states that the universe is slowly coming back to a center.

• A theory that states that the universe started in a small mass and then expanded, the expansion cooled down the temperature and that resulted in the formation of matter, energy, space and time.

The red-shift in the spectral lines of light, reaching us from other galaxies implies that these galaxies ____________.

• Are moving closer to one another

• Are moving farther apart from one another

• Are in rapid rotation

• Redshift doesn´t exist

Light emitted from a star or galaxy can be separated into a band of colors, called a ________.

• Red Shift

• Wave Length

• Spectrum

• Microwave

This type of galaxy is generally considered to be older and is no longer forming stars.

• Spiral

• Irregular

• Elliptical

• Transition Galaxies

What type of galaxy is the Milky Way?

• Spiral

• Elliptical

• Irregular

• Transition