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