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