A) An automobile that operates on fuel cells
B) A gasoline burning automobile
C) A coal burning generator
D) A wood burning stove

A) The moon
B) Running water
C) The sun
D) Heat from within the Earth's crust

A) The state of the atmosphere at any particular time
B) The speed of the wind
C) The amount of moisture in the air
D) The number of clouds in the sky

A) Atmosphere
B) Magnetic Field
C) Rotation
D) Temperature

A) The sun protects life on Earth
B) The sun damages life on Earth
C) The sun causes plants to wither and die
D) The sun powers life on Earth

A) The tilt of the Earth on it's axis
B) The Earth's rotation
C) Changes in the sun's intensity
D) The Earth's changing distance from the sun

A) It reflects light from stars
B) It reflects light from Earth
C) It makes it's own light
D) Because it reflects sunlight

A) Sunken plains, or seas
B) Mountains
C) Deep craters
D) High plateaus

A) Light
B) Heat
C) Motion
D) Electricity

A) Wind and rain
B) Motion and time
C) Lift and thrust
D) Temperature and pressure