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