A) An automobile that operates on fuel cells B) A wood burning stove C) A coal burning generator D) A gasoline burning automobile
A) The sun B) Heat from within the Earth's crust C) Running water D) The moon
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) Temperature B) Rotation C) Magnetic Field D) Atmosphere
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 Earth's rotation C) The Earth's changing distance from the sun D) The tilt of the Earth on it's axis
A) It makes it's own light B) Because it reflects sunlight 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) Heat B) Light C) Electricity D) Motion
A) Wind and rain B) Temperature and pressure C) Lift and thrust D) Motion and time |