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