A) A gasoline burning automobile B) A coal burning generator C) An automobile that operates on fuel cells D) A wood burning stove
A) The moon B) Running water C) Heat from within the Earth's crust D) The sun
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 protects life on Earth B) The sun powers life on Earth C) The sun causes plants to wither and die D) The sun damages 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 stars C) Because it reflects sunlight D) It reflects light from Earth
A) Sunken plains, or seas B) Deep craters C) High plateaus D) Mountains
A) Electricity B) Motion C) Light D) Heat
A) Lift and thrust B) Motion and time C) Temperature and pressure D) Wind and rain |