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