Unit 1 Test Universe and Solar System

1. Venus experiences an intense greenhouse effect.

• True

• False

There are three types of galaxies: spiral, elliptical, and regular.

• True

• False

Our solar system is located in the center of the Milky Way galaxy.

• True

• False

Inner planets are made mainly of solid rocky materials.

• True

• False

The outer planets are called gas dwarfs.

• True

• False

 A _____ is a huge collection of stars.

• galaxy

• solar system

• super nova

• universe

All of the following are true of the Milky Way EXCEPT that it _____.

• has more than 800 billion stars

• is 100,000 light-years across

• is a member of the Local Group

• is a spiral galaxy

A galaxy that has a shape similar to a football is a(n) _____ galaxy.

• barred spiral

• elliptical

• normal spiral

• irregular

The _____ states that between 15 and 20 billion years ago, the universe began expanding out of an enormous explosion.

• Big Bang theory

• "big crunch" theory

• H-R diagram

• binary star theory

The spiral shape of the Milky Way Galaxy CANNOT be seen from Earth because _____.

• we are located above the galaxy

• our view is blocked by

  the Sun

• we are located within one of its spiral arms

• none of the above