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