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