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