Earth and Space Semester Exam

Most scientists believe the Big Bang Theory explains which of the following questions?

• How our planets and moons formed

• How our universe began

• How the sun turns hydrogen into helium

• How fast light travels through space

As part of the modern theory of the origins of the elements, it is hypothesized that before the formation of the stars, most of the matter in the universe consisted of what atoms?

• hydrogen and helium

• nitrogen and carbon

• silicon and lithium

• uranium and radium

First space celebrity/worked for NASA

• Sagan

• Brahe

• Kepler

• Einstein

The only planet that supports life.

• Pluto

• Mars

• Earth

• Mercury

The length of a year on a planet is best explained by

• The planet rotating on its axis

• The Sun rotating on its axis

• The revolution around the Sun

• The seasons

The spinning of an object on its axis is called______

• orbit

• rotation

• revolution

• tide

an immense cloud of dust & gas where stars are born

• black hole

• nebula

• prominence

• supernova

All of the galaxies together is _______.

• nebula

• solar system

• Milky Way

• universe

The color of the star tells us its 

• composition

• Temperature

• Luminosity 

• Mass

The life cycles of stars are determined by their:

• mass (size)

• color

• distance from Earth

• luminosity