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