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