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