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