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