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