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