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