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