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