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