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