A) A wood burning stove B) A coal burning generator C) A gasoline burning automobile D) An automobile that operates on fuel cells
A) The moon B) Running water C) Heat from within the Earth's crust D) The sun
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) Temperature C) Magnetic Field D) Rotation
A) The sun protects life on Earth B) The sun damages life on Earth C) The sun powers life on Earth D) The sun causes plants to wither and die
A) The Earth's changing distance from the sun B) The Earth's rotation 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) Because it reflects sunlight C) It reflects light from Earth D) It reflects light from stars
A) Deep craters B) Sunken plains, or seas C) High plateaus D) Mountains
A) Heat B) Motion C) Electricity D) Light
A) Motion and time B) Temperature and pressure C) Wind and rain D) Lift and thrust |