Lesson 1 Review - Origins of the galaxy and solar system

What is the term for Earth being in the center?

• geocentric
• heliocentric
• sun centered
• Galileo

Whose heliocentric model is seen as the first step in the development of the modern models of the solar system?

• Galileo
• Copernicus
• Ptolemy
• Kepler

A model of the solar system in which Earth and the other planets revolve around the SUN.

• Heliocentric
• Geocentric

The soalr system is believed to have come from a swirling dense hot cloud of dust and gas. What do you call this huge ball of dust and gas?

• cosmos

• nebula

• planetesimal

• sun

Which is the most accepted theory that explains the beginning of the solar system?

• Big Bang Theory

• Nebular Theory

• Planetesimal Theory

• Tidal Theory

Why is geocentric theory different from heliocentric theory?

• Because in geocentric theory, the earth is the center of the solar system while the sun is the center in heliocentric theory.

• Because in geocentric theory, the earth is the center of the solar system while the moon is the center in heliocentric theory.

• Because in geocentric theory, the moon is the center of the solar system while the sun is the center in heliocentric theory.

• Because in heliocentric theory, the earth is the center of the solar system while the sun is the center in geocentric theory.

Solar system is believed to occur based on a certain theory. How does the nebular hypothesis occur?

• through a great cloud of gas and dust which begin to collapse because of gravitational pull

• through the biblical creation of God

• through the massive speeding of stars that passed near the sun and pulled off material due to gravitational pull

• through the rapid expansion of the solar system which is faster than the speed of light

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 started as a point and is moving towards each other

The vast majority of galaxies in our universe are moving away from us.  We know this because we observe __________ in the galaxies absorption spectra.

• Redshift
• Blueshift
• Turbulance
• Superposition

Since the Big Bang, and even today, the universe is still _____.

• Expanding

• Shrinking

• Cooking

• Spinning