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