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