A) An automobile that operates on fuel cells B) A wood burning stove C) A gasoline burning automobile D) A coal burning generator
A) The moon B) Heat from within the Earth's crust C) The sun 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) Magnetic Field C) Temperature D) Atmosphere
A) The sun powers life on Earth B) The sun damages life on Earth C) The sun causes plants to wither and die 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 Earth's rotation D) The tilt of the Earth on it's axis
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) Deep craters B) Mountains C) Sunken plains, or seas D) High plateaus
A) Motion B) Heat C) Electricity D) Light
A) Wind and rain B) Lift and thrust C) Motion and time D) Temperature and pressure |