E1ab Astronomy Review

How many starts are in our Solar System?

• millions

• billions

• one

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

• This Big Bang Theory

• Universal Theory

What kind of model of our solar system is this?

• Geocentric Model

• Heliocentric Model

What is a huge collection of gas, dust, and billions of stars held together by gravity called?

• a planet

• our solar system

• a galaxy

• the universe

A Heliocentric Model of our solar system has everything orbiting (revolving) around _____

• the moon

• the Sun

• Earth

What is this is a picture of?

• a planet

• our solar system

• a galaxy

• the universe

This is a

• Heliocentric Model

• Geocentric model

Rotation is the way Earth ______.

• spins

• orbits

The mass of an object and what other factor affects the force of gravity exerted between two objects?

• the shape of the planets' orbits

• the color of the object

• the distance between the objects

What is the biggest difference between the Geocentric Model and the Heliocentric Model?

• the shape of the planets' orbits

• the movement of the moon

• the object at the center of the universe

• the brightness of the sun