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