A) An automobile that operates on fuel cells B) A gasoline burning automobile C) A wood burning stove D) A coal burning generator
A) Heat from within the Earth's crust B) The moon C) Running water D) The sun
A) The number of clouds in the sky B) The state of the atmosphere at any particular time C) The amount of moisture in the air D) The speed of the wind
A) Rotation B) Magnetic Field C) Temperature D) Atmosphere
A) The sun protects life on Earth B) The sun powers life on Earth C) The sun damages life on Earth D) The sun causes plants to wither and die
A) The Earth's rotation B) The Earth's changing distance from the sun C) Changes in the sun's intensity D) The tilt of the Earth on it's axis
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) High plateaus D) Mountains
A) Motion B) Heat C) Light D) Electricity
A) Temperature and pressure B) Wind and rain C) Motion and time D) Lift and thrust |