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

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

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

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

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

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

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

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

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

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