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) Running water C) The sun D) The moon
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) Atmosphere B) Rotation C) Temperature D) Magnetic Field
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) The tilt of the Earth on it's axis B) Changes in the sun's intensity C) The Earth's changing distance from the sun D) The Earth's rotation
A) It reflects light from Earth B) Because it reflects sunlight C) It reflects light from stars D) It makes it's own light
A) Mountains B) Deep craters C) Sunken plains, or seas D) High plateaus
A) Electricity B) Heat C) Motion D) Light
A) Lift and thrust B) Motion and time C) Temperature and pressure D) Wind and rain |