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