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