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