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