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) Running water C) The moon D) Heat from within the Earth's crust
A) The state of the atmosphere at any particular time B) The amount of moisture in the air C) The speed of the wind D) The number of clouds in the sky
A) Atmosphere B) Magnetic Field C) Rotation 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 tilt of the Earth on it's axis B) The Earth's changing distance from the sun C) Changes in the sun's intensity D) The Earth's rotation
A) It reflects light from Earth B) Because it reflects sunlight C) It makes it's own light D) It reflects light from stars
A) Sunken plains, or seas B) High plateaus C) Deep craters D) Mountains
A) Heat B) Light C) Electricity D) Motion
A) Motion and time B) Lift and thrust C) Wind and rain D) Temperature and pressure |