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