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