A) A coal burning generator B) An automobile that operates on fuel cells C) A gasoline burning automobile D) A wood burning stove
A) Heat from within the Earth's crust B) The sun C) Running water D) The moon
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) Temperature B) Rotation C) Atmosphere D) Magnetic Field
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) 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 stars B) It makes it's own light C) Because it reflects sunlight D) It reflects light from Earth
A) Deep craters B) High plateaus C) Mountains D) Sunken plains, or seas
A) Motion B) Electricity C) Heat D) Light
A) Temperature and pressure B) Motion and time C) Wind and rain D) Lift and thrust |