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