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

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 amount of moisture in the air
C) The number of clouds in the sky
D) The speed of the wind

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

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

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

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

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

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