A) A gasoline burning automobile B) An automobile that operates on fuel cells C) A coal burning generator D) A wood burning stove
A) Running water B) Heat from within the Earth's crust C) The sun D) The moon
A) The number of clouds in the sky B) The amount of moisture in the air C) The state of the atmosphere at any particular time D) The speed of the wind
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 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) Because it reflects sunlight C) It reflects light from Earth D) It reflects light from stars
A) Mountains B) Sunken plains, or seas C) Deep craters D) High plateaus
A) Electricity B) Heat C) Light D) Motion
A) Lift and thrust B) Motion and time C) Temperature and pressure D) Wind and rain |