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