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