Solar System

A small, rocky object that orbits the sun, usually between Mars & Jupiter:

• Comet

• Asteroid

• Meteor

• Meteoroid

A bright streak of light that results when a meteoroid burns up in Earth’s atmosphere:

• Comet

• Asteroid

• Meteor

• Meteoroid

A small body of ice, rock, and dust that follows an elliptical orbit around the sun:

• Comet

• Asteroid

• Meteor

• Meteoroid

The theory that states that Earth is the center of the universe:

• Geocentric theory

• Heliocentric theory

• Geologic model

• Solar model

The theory that states that the Sun is the center of the universe:

• Geocentric theory

• Heliocentric theory

• Geologic model

• Solar model

The force that governs the motion of objects in space:

• orbit

• elliptical

• inertia

• gravity

Which astronomer developed the heliocentric theory?

• Ptolemy

• Copernicus

• Newton

• Galileo

Which astronomer developed the geocentric theory?

• Ptolemy

• Copernicus

• Newton

• Galileo

This astronomer discovered craters and mountains on the Moon and sunspots on our Sun:

• Ptolemy

• Copernicus

• Newton

• Galileo

This theory states that the universe began with a tremendous explosion 13.7 billion years ago:

• Evolutionary theory

• Big bang theory

• Astronomical theory

• Universal theory