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