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