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