A) A coal burning generator B) A wood burning stove C) A gasoline burning automobile D) An automobile that operates on fuel cells
A) Running water B) The moon C) The sun D) Heat from within the Earth's crust
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) Atmosphere C) Magnetic Field D) Rotation
A) The sun protects life on Earth B) The sun powers life on Earth C) The sun damages life on Earth D) The sun causes plants to wither and die
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) Because it reflects sunlight B) It reflects light from Earth C) It makes it's own light D) It reflects light from stars
A) Mountains B) Sunken plains, or seas C) High plateaus D) Deep craters
A) Electricity B) Light C) Heat D) Motion
A) Temperature and pressure B) Wind and rain C) Motion and time D) Lift and thrust |