A) A coal burning generator B) A gasoline burning automobile C) A wood burning stove D) An automobile that operates on fuel cells
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) Temperature B) Magnetic Field C) Rotation D) Atmosphere
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 Earth's changing distance from the sun B) Changes in the sun's intensity C) The tilt of the Earth on it's axis D) The Earth's rotation
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) Deep craters C) Sunken plains, or seas D) Mountains
A) Motion B) Heat C) Light D) Electricity
A) Motion and time B) Temperature and pressure C) Lift and thrust D) Wind and rain |