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