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