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