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