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