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