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