Models and Motion of the Planetary System

What is the term for Earth being in the center?

• geocentric
• heliocentric
• sun centered
• Galileo

The ancient Greek who proposed a geocentric model of the universe is

• Ptolomy
• Galileo
• Copernicus
• Kepler

Which scientist found that planetary orbits were elliptical?

• Galileo
• Ptolemy
• Copernicus
• Kepler

Galileo approached questions in a fashion that is now known as what?

• scientific theory
• scientific method
• earth science
• scientific law

When Galileo peered into the telescope and saw that Venus went through phases, what did this suggest?

• The telescope must possibly be wrong.
• Venus had a moon orbiting it.
• Venus must be orbiting the Sun.
• Venus had moons just like Earth.

Which is not evidence for the geocentric model?

• The sun moves across the sky from east to west every day.
• The moon moves around the Earth every day.
• The stars move across the sky every night.
• The planets display retrograde movement in the sky. 

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

A model of the universe in which Earth is at the center of the revolving planets and stars. This includes the sun revolving around the Earth. This model is no longer supported.

• Geocentric
• Heliocentric

The Word "Helio" Refers To?

• Earth
• Mars
• Sun
• Juputer