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 sun B) Heat from within the Earth's crust C) Running water D) The moon
A) The amount of moisture in the air B) The number of clouds in the sky C) The state of the atmosphere at any particular time D) The speed of the wind
A) Temperature B) Atmosphere C) Magnetic Field D) Rotation
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) The tilt of the Earth on it's axis B) Changes in the sun's intensity C) The Earth's rotation D) The Earth's changing distance from the sun
A) It reflects light from Earth B) Because it reflects sunlight C) It reflects light from stars D) It makes it's own light
A) Mountains B) High plateaus C) Sunken plains, or seas D) Deep craters
A) Electricity B) Motion C) Heat D) Light
A) Temperature and pressure B) Motion and time C) Lift and thrust D) Wind and rain |