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