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