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