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