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