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