Solar System

What does the term "geocentric" refer to?

• The system where people believe that the Earth is the center of the solar system

• The system where people believe that the sun is the center of the solar system

• An oval shape

• The system where people believe that the moon is the center of the solar system

Which system describes the belief that the sun is the center of the solar system?

• Geocentric

• Heliocentric

• Ellipse

• Lunarcentric

What is the definition of an ellipse?

• A perfect circle

• A triangle

• An oval shape

• A square

Compare the geocentric and heliocentric models. What is the main difference between them?

• The geocentric model places the Earth at the center, while the heliocentric model places the sun at the center.

• The geocentric model places the sun at the center, while the heliocentric model places the Earth at the center.

• Both models place the moon at the center.

• Both models place an ellipse at the center.

In a geocentric system, what is at the center of the revolving planets and stars?

• Earth

• The Sun

• The Moon

• Jupiter

Who was the Greek astronomer who further developed the geocentric model around 140 A.D.?

• Copernicus

• Galileo

• Ptolemy

• Newton

According to Ptolemy's model, what is at the center of the system of planets and stars?

• The Sun

• The Moon

• Earth

• Mars

In Ptolemy's model, how do planets move?

• In straight lines

• In small circles that move on a bigger circle

• In random paths

• Only around the Sun

What is a key feature of the geocentric model as developed by Ptolemy?

• The Sun is at the center of the universe

• Planets move in straight lines

• Earth is at the center and planets move in epicycles

• Stars revolve around the Moon

This diagram represents which model?

• This diagram represents the heliocentric model

• This diagram shows the geocentric model developed by Ptolemy

• This diagram shows the modern model of the solar system

• This diagram shows the movement of comets