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