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