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