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