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