3.1: Models of the Solar System & 3.2: Introducing the Solar Sys

Here on Earth, what does it seem like our planet is doing?

• Not moving with the sun, moon, and stars moving around us

• Moving with the sun, moon, and stars moving around us

• Moving with the sun, moon, and stars not moving around us

• Not moving with the sun, moon, and stars not moving around us

Shuttles, telescopes, and cameras are tools we had centuries ago.

• True

• False

What did early observers of Earth believe?

• Earth was the center.

• Sun was the center.

• Pluto was the center.

• Mars was the center.

This system is Earth-centered.

• Geocentric

• Heliocentric

This system is Sun-centered.

• Geocentric

• Heliocentric

All people did not believe in the geocentric system because a new model was introduced, the heliocentric.

• True

• False

Early observers and Ptolemy discovered and improved this model.

• Geocentric

• Heliocentric

Aristarchus created this model.

• Geocentric

• Heliocentric

Which is our solar system NOT made up of?S

• Sun

• Planets and their moons

• Smaller objects

• Fire

This force holds the solar system together.

• Gravity

• Friction

• Push

• Pull