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