A) A gasoline burning automobile B) A coal burning generator C) A wood burning stove D) An automobile that operates on fuel cells
A) The sun B) Running water C) The moon D) Heat from within the Earth's crust
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) Rotation C) Magnetic Field D) Atmosphere
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 tilt of the Earth on it's axis B) Changes in the sun's intensity C) The Earth's changing distance from the sun D) The Earth's rotation
A) It reflects light from Earth B) It makes it's own light C) It reflects light from stars D) Because it reflects sunlight
A) Sunken plains, or seas B) High plateaus C) Deep craters D) Mountains
A) Electricity B) Heat C) Light D) Motion
A) Motion and time B) Temperature and pressure C) Wind and rain D) Lift and thrust |