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