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