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