Category 3 - Space and Earth

Which object in our solar system reflects light and is a satellite around one planet?

• Earth
• The sun
• Mercury
• The moon

From Earth, the sun appears brighter than any other star because the sun is the 

• newest star
• largest star
• closest star
• hottest star

Which statement best describes the Big Bang Theory?

• Galaxies within the universe collided about 13.5 billion years ago, forming the present objects in the universe.
• Existing objects in the universe move randomly with the potential of colliding about 13.5 billion years in the future.
• Galaxies in the universe moved towards each other after an event that occurred about 13.5 billion years ago.
• Most objects in the universe are moving away from each other as a result of an event that occurred about 13.5 billion years ago.

A new star most likely form in a...

• nebula
• black hole
• supernova
• asteroid field

Why do the positions of the stars change in the universe?

• stars get smaller as they age
• stars get bigger as they age
• the universe is expanding
• the universe is contracting

The galaxies pictured would best be classified as 

• barred galaxies
• spiral galaxies
• irregular galaxies
• symmetrical galaxies

The sun is an average yellow star in the Milky Way galaxy, which us described as 

• a dwarf galaxy
• a spiral galaxy
• an elliptical galaxy
• an irregular galaxy

What do the 4 planets closest to the sun have in common?

• their solid, rocky surface
• composition of their atmosphere
• length of their day
• their surface temperature

The color of a star provides a measure of it's  

• size
• composition
• temperature 
  surface temperature
• mass

Which statement best describes the diagram?

• Earth is rotating around the Sun
• Sun is rotating around the Earth
• Earth is revolving around the Sun
• Sun is revolving around the Earth