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