Astronomy Review

Over time, scientists have changed their model of our solar system. It has transitioned from

• a sun-centered to an moon-centered model

• a sun-centered to an earth-centered model

• an earth-centered to a sun-centered model

• a moon-centered to an earth-centered model

Many years ago, people believed that the Earth was the center of the solar system because from Earth, it looks as if the stars and the Sun

• revolve around the Earth

• are controlled by the Earth

• are much smaller than the Earth

• move more quickly than the Earth

Tags

NGSS.MS-ESS1-1

Our Solar System is in the Milky Way galaxy. What shape is this galaxy?

• oval

• rectangular

• spiral

• triangular

Tags

NGSS.MS-ESS1-2

What can you tell about the location of the Sun from this illustration of the Milky Way?

• It is outside of the Milky Way

• It is near an outer arm of the Milky Way

• It is on the right side of the Milky Way

• It is within the Central Bulge of the Milky Way

Tags

NGSS.MS-ESS1-1

NGSS.MS-ESS1-2

Based on the information in the table, which inner planet is closest to the Sun?

• Earth

• Mars

• Mercury

• Venus

Tags

NGSS.MS-ESS1-3

What is the name of the galaxy where Earth is located?

• Andromeda

• Sun Galaxy

• Comet Galaxy

• Milky Way Galaxy

Hundreds of years ago, it was believed by many that our solar system was Geocentric. This means that Earth is at the center of the solar system, with the Sun and other planets orbit around it. Today, the solar system is now thought to be Heliocentric.

What does this mean?

• The Sun and other planets orbit Earth

• Earth and all the other planets orbit the Sun

• The other planets orbit Earth, and Earth orbits the Sun

• The Sun orbits Earth and the other planets orbit the Sun

The ______________model was first summarized by Aristotle and Plato in the 4th Century BC and later updated by Ptolemy, a Greek philosopher, about 100-200 AD. In the model the Earth is motionless at the center of universe.

• geocentric

• gravocentric

• heliocentric

• solarcentric

The images in the picture are particles of debris that are sometimes called shooting stars. They are

• interplanetary dust

• asteroids

• meteors

• comets

A streak of light, seen when a space rock enters Earth's atmosphere and begins to burn up. This is called a(n)

• asteroid

• comet

• meteor

• meteoroid