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