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