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