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