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