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