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 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 speed of the wind C) The state of the atmosphere at any particular time D) The number of clouds in the sky
A) Atmosphere B) Rotation C) Temperature D) Magnetic Field
A) The sun damages life on Earth B) The sun powers life on Earth C) The sun causes plants to wither and die D) The sun protects life on Earth
A) The Earth's changing distance from the sun B) The Earth's rotation C) The tilt of the Earth on it's axis D) Changes in the sun's intensity
A) Because it reflects sunlight B) It reflects light from stars C) It reflects light from Earth D) It makes it's own light
A) Sunken plains, or seas B) High plateaus C) Mountains D) Deep craters
A) Electricity B) Motion C) Light D) Heat
A) Motion and time B) Wind and rain C) Temperature and pressure D) Lift and thrust |