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