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