A) A coal burning generator B) A gasoline burning automobile C) A wood burning stove D) An automobile that operates on fuel cells
A) Heat from within the Earth's crust B) The moon C) The sun D) Running water
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) Magnetic Field B) Temperature C) Atmosphere D) Rotation
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 tilt of the Earth on it's axis B) The Earth's rotation C) The Earth's changing distance from the sun D) Changes in the sun's intensity
A) It makes it's own light B) It reflects light from stars C) It reflects light from Earth D) Because it reflects sunlight
A) Deep craters B) Mountains C) Sunken plains, or seas D) High plateaus
A) Motion B) Electricity C) Light D) Heat
A) Temperature and pressure B) Wind and rain C) Motion and time D) Lift and thrust |