A) A wood burning stove B) An automobile that operates on fuel cells C) A coal burning generator D) A gasoline burning automobile
A) The moon B) The sun C) Heat from within the Earth's crust D) Running water
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 causes plants to wither and die B) The sun damages life on Earth C) The sun protects life on Earth 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) Changes in the sun's intensity D) The Earth's rotation
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) Deep craters B) Sunken plains, or seas C) High plateaus D) Mountains
A) Light B) Motion C) Heat D) Electricity
A) Temperature and pressure B) Lift and thrust C) Motion and time D) Wind and rain |