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