A) An automobile that operates on fuel cells B) A wood burning stove C) A gasoline burning automobile D) A coal burning generator
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 amount of moisture in the air D) The number of clouds in the sky
A) Temperature B) Rotation C) Atmosphere D) Magnetic Field
A) The sun damages life on Earth B) The sun protects life on Earth C) The sun powers 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) It makes it's own light B) It reflects light from Earth C) It reflects light from stars D) Because it reflects sunlight
A) Deep craters B) Mountains C) High plateaus D) Sunken plains, or seas
A) Heat B) Light C) Electricity D) Motion
A) Motion and time B) Temperature and pressure C) Wind and rain D) Lift and thrust |