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