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