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