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