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