A) A coal burning generator B) An automobile that operates on fuel cells C) A wood burning stove D) A gasoline burning automobile
A) Running water B) The sun C) Heat from within the Earth's crust D) The moon
A) The state of the atmosphere at any particular time B) The number of clouds in the sky C) The speed of the wind D) The amount of moisture in the air
A) Magnetic Field B) Temperature C) Rotation D) Atmosphere
A) The sun causes plants to wither and die B) The sun damages life on Earth C) The sun powers life on Earth D) The sun protects life on Earth
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) Sunken plains, or seas C) Mountains D) High plateaus
A) Motion B) Light C) Heat D) Electricity
A) Lift and thrust B) Temperature and pressure C) Wind and rain D) Motion and time |