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