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 moon D) The sun
A) The amount of moisture in the air B) The number of clouds in the sky C) The speed of the wind D) The state of the atmosphere at any particular time
A) Atmosphere B) Rotation C) Magnetic Field D) Temperature
A) The sun damages life on Earth B) The sun powers life on Earth C) The sun causes plants to wither and die D) The sun protects life on Earth
A) The Earth's changing distance from the sun B) The tilt of the Earth on it's axis C) The Earth's rotation 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) Deep craters B) Mountains C) Sunken plains, or seas D) High plateaus
A) Light B) Motion C) Heat D) Electricity
A) Motion and time B) Temperature and pressure C) Wind and rain D) Lift and thrust |