A) An automobile that operates on fuel cells B) A coal burning generator C) A wood burning stove D) A gasoline burning automobile
A) The moon B) Heat from within the Earth's crust C) Running water D) The sun
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) Magnetic Field B) Temperature C) Atmosphere D) Rotation
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) Changes in the sun's intensity C) The Earth's rotation D) The tilt of the Earth on it's axis
A) It reflects light from stars B) It reflects light from Earth C) Because it reflects sunlight D) It makes it's own light
A) Mountains B) Sunken plains, or seas C) High plateaus D) Deep craters
A) Electricity B) Light C) Motion D) Heat
A) Lift and thrust B) Motion and time C) Temperature and pressure D) Wind and rain |