A) A gasoline burning automobile B) A wood burning stove C) A coal burning generator D) An automobile that operates on fuel cells
A) Heat from within the Earth's crust B) The sun C) The moon D) Running water
A) The speed of the wind B) The number of clouds in the sky C) The state of the atmosphere at any particular time D) The amount of moisture in the air
A) Atmosphere B) Temperature C) Rotation D) Magnetic Field
A) The sun causes plants to wither and die B) The sun powers life on Earth C) The sun protects life on Earth D) The sun damages life on Earth
A) Changes in the sun's intensity B) The Earth's changing distance from the sun C) The Earth's rotation D) The tilt of the Earth on it's axis
A) Because it reflects sunlight B) It makes it's own light C) It reflects light from stars D) It reflects light from Earth
A) Sunken plains, or seas B) Deep craters C) High plateaus D) Mountains
A) Heat B) Light C) Electricity D) Motion
A) Temperature and pressure B) Motion and time C) Lift and thrust D) Wind and rain |