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