A) A wood burning stove B) A gasoline burning automobile 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 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) Temperature B) Rotation C) Magnetic Field D) Atmosphere
A) The sun powers life on Earth B) The sun protects life on Earth C) The sun causes plants to wither and die D) The sun damages life on Earth
A) The tilt of the Earth on it's axis B) The Earth's changing distance from the sun C) Changes in the sun's intensity D) The Earth's rotation
A) It reflects light from Earth B) It makes it's own light C) Because it reflects sunlight D) It reflects light from stars
A) Deep craters B) Sunken plains, or seas C) High plateaus D) Mountains
A) Light B) Electricity C) Motion D) Heat
A) Temperature and pressure B) Lift and thrust C) Motion and time D) Wind and rain |