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