FCAT Earth Science (space)

Which planet has the fastest orbital speed, due to its distance from the sun?

• Mars

• Saturn

• Mercury

• Earth

Which object was downgraded to a dwarf planet because of its size?

• Mercury
• Mars
• Neptune
• Pluto

Which planet has the greatest amount of moons?

• Mars
• Neptune
• Jupiter
• Earth

What is the best explanation of why Saturn has more moons than Earth?

• Earth is too close to the sun
• Earth has more gravity
• Saturn has more gravity
• Saturn does not have any moons

Why does Mercury have more craters from asteroids than earth?

• Earth has an atmosphere that destroys asteroids, Mercury does not.
• Mercury smaller, so the craters look bigger than they are
• Earth actually has more craters than Mercury

As planets move around the sun, where are they moving the fastest?

• When they are farthest from the sun
• Where they are closest to the sun
• During the summer months
• During the winter months

What two factors give stars their brightness?

• Distance and actual luminosity
• Temperature and color
• Color and distance
• Brightness and temperature

Why is the sun the brightest star we see?

• Because it is the brightest star in the universe
• Because it is the closest star
• Because it is the hottest star
• Because it is yellow

How do stars release their excess energy?

• Through solar flares  and prominence 
• Through a black hole
• Through light only

What answer does not effect Earth's seasons?

• The 23.5 degree tilt on the axis

• The axis pointed toward Polaris

• The revolution around the sun

• The Earth's rotation